CAS Search
Related Chemical Product
Buy Chemical NO: 124-04-9
  • Urgent Purchase CAS NO.:124-04-9
  • Please post your buying leads! Our suppliers will contact you later!
  • For suppliers to better understand your request, enter more info here.

* Product Name:
CAS No.:
* Quantity:
 
 Metric Ton     Kilogram    Gram    Pound
* Valid For:
 5 Days    15    1 Month    3 Month    6 Month    1 Year
* Description:

Max 2000 characters.  Please enter detailed description for the product.
* Email:
 

Adipic acid ( CASNO:124-04-9 )

Identification and Related Records
Name:
Adipic acid
CAS Registry number:
124-04-9
Iupac name:
hexanedioic acid
Synonyms:
FEMA No. 2011
Adipic acid
Hexane diacid
Heptanedoic
1, 4-Butanedicarboxylic acid
Adipinsaeure
Hexan-1,6-dicarboxylate
Kyselina adipova
Inipol DS
hexanedioic acid
1,4-butanedicarboxylic acid
Adipate
Hexanedioate
Adilactetten
Molten adipic acid
Acifloctin
1,6-Hexanedioic acid
Acinetten
EINECS(EC#):
204-673-3
Molecular Formula:
C6H10O4
Molecular Weight:
146.14
Inchi:
InChI=1/C6H10O4/c7-5(8)3-1-2-4-6(9)10/h1-4H2,(H,7,8)(H,9,10)
InChIKey:
WNLRTRBMVRJNCN-UHFFFAOYSA-N
Canonical SMILES:
C(CCC(=O)O)CC(=O)O
Chemical and Physical Properties
Appearance:
White crystalline powder.
Density:
1.36 g/cm3
Melting Point:
151-154℃(lit.)
Boiling Point:
337℃
Vapour:
1.81E-05mmHg at 25°C
Refractive Index:
1.439
Flash Point:
196℃
Water:
1.44 g/100 mL (15℃)
Solubilities:
1.44 g/100 mL (15℃) in water
methanol: 0.1 g/mL, clear, colorless
Color/Form:
Monoclinic prisms from ethyl acetate, water, or acetone and petroleum ether
Fine white crystals or powder
White solid
Colorless
Stability:
Stable. Substances to be avoided include ammonia, strong oxidizing agents.
HS Code:
29171210
Storage temp:
Keep away from sources of ignition. Store in a tightly closed container. Keep from contact with oxidizing materials. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from strong bases.
Spectral properties:
IR: 281 (Sadtler Research Laboratories Prism Collection)
MASS: 821 (Atlas of Mass Spectral Data, John Wiley & Sons, New York)
Intense mass spectral peaks: 55 m/z (100%), 41 m/z (55%), 100 m/z (46%), 45 m/z (37%)
SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.
Computed Properties:
Molecular Weight:146.1412 [g/mol]
Molecular Formula:C6H10O4
XLogP3:0.1
H-Bond Donor:2
H-Bond Acceptor:4
Rotatable Bond Count:5
Exact Mass:146.057909
MonoIsotopic Mass:146.057909
Topological Polar Surface Area:74.6
Heavy Atom Count:10
Formal Charge:0
Complexity:114
Isotope Atom Count:0
Defined Atom Stereocenter Count:0
Undefined Atom Stereocenter Count:0
Defined Bond Stereocenter Count:0
Undefined Bond Stereocenter Count:0
Covalently-Bonded Unit Count:1
Feature 3D Acceptor Count:4
Feature 3D Anion Count:2
Feature 3D Hydrophobe Count:1
Effective Rotor Count:5
Conformer Sampling RMSD:0.6
CID Conformer Count:33
Safety and Handling
Hazard Codes:
Xi:Irritant
Risk Statements:
R36
Safety Statements:
S26
HazardClass:
9.2
Skin, Eye, and Respiratory Irritations:
Dust: Irritating to eyes, nose, and throat. Solid: Irritating to skin and eyes.
Cleanup Methods:
Environmental considerations- land spill: Dig a pit, pond, lagoon, or holding area to contain liquid or solid material.
SRP: If time permits, pits, ponds, lagoons, soak holes, or holding areas should be sealed with an impermeable flexible membrane liner.
Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water.
Environmental considerations- water spill: Use natural deep water pockets, excavated lagoons, or sand bag barriers to trap material at bottom. If dissolved, in region of 10 ppm or greater concentration, apply activated carbon at ten times the spilled amount. Remove trapped material with suction hoses. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
Electrochemical measurements have been made on the system Cu(2+), adipic acid, nitric acid (which models the effluent from adipic acid plants) to investigate the reasons for the observed low current efficiency for copper deposition from such soln. The most probable cause is a cathodic shift in the deposition potential of copper making the reduction of NO3- the preferred process. Depletion experiments have been carried out on real effluent in two three-dimensional cells, a bipolar trickle tower and a porous reticulated carbon bed. Each performs reasonably well and, while the current efficiencies are low (about 20%), the deposition is essentially mass-transfer controlled.
Neutralizing agents for acids and caustics: Rinse with dilute soda ash solution.
Transport:
UN 9077
Fire Fighting Procedures:
Stop discharge if possible, keep people away. Shut off ignition sources. Call fire department. Avoid contact with solid and dust. Isolate and remove discharged material.
If material on fire or involved in fire: Use water in flooding quantities as fog. Solid streams of water may spread fire. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use foam, dry chemical, or carbon dioxide.
Fire Potential:
Combustible when exposed to heat or flame.
Formulations/Preparations:
GRADES: TECHNICAL; FCC
Grades of purity: Commercial, 99.8%
Food grades
Exposure Standards and Regulations:
Substance added directly to human food affirmed as generally recognized as safe (GRAS).
This substance is generally recognized as safe when used as a buffer and neutralizing agent in accordance with good manufacturing or feeding practice.
Adipic acid is an indirect food additive in polymer used as a basic component of single and repeated use food contact surfaces. Polyurethane resins (produced when one or more of the isocyanates listed in paragraph (a)(1) of this section is made to react with one or more of the substances listed in paragraph (a)(2) of this section in which adipic acid is included are approved for use on dry solids with the surface containing no free fat or oil (no end test required).
Adipic acid is an indirect food additive polymer for use as a basic component of single and repeated use food contact surfaces. Cross-linked polyester resins (produced by the condensation of one or more of the acids listed in paragraph (a)(1) of this section /in which adipic acid is included/ with one or more of the alcohols or epoxides listed in paragraph (a)(2) of this section, followed by copolymerization with one or more of the cross-linking agents listed in paragraph (a)(3) of this section), shall meet the following extractives limitations: net chloroform-soluble extractives not to exceed 0.1 mg/sq in of food contact surface tested when the prescribed food-simulating solvent is water or 8 or 50% alcohol; total nonvolatile extractives not to exceed 0.1 mg/sq in of food contact surface when solvent is heptane. In accordance with good manufacturing practice, finished articles containing the cross-linked polyester resins should be cleansed prior to first use in contact with food.
Reactivities and Incompatibilities:
Can react with oxidizing materials.
Other Preventative Measures:
If material not on fire and not involved in fire: Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary.
Personnel protection: Avoid breathing vapors or dusts. Do not handle broken packages unless wearing appropriate personal protective equipment. Wash away any material which may have contacted the body with copious amounts of water or soap and water.
Although there are no special precautions in the normal handling of adipic acid, good industrial housekeeping practices, personal hygiene, and avoidance of prolonged and repeated skin or eye contact is indicated.
SRP: Contaminated protective clothing should be segregated in such a manner so that there is no direct personal contact by personnel who handle, dispose, or clean the clothing. Quality assurance to ascertain the completeness of the cleaning procedures should be implemented before the decontaminated protective clothing is returned for reuse by the workers.
SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.
Protective Equipment and Clothing:
Wear safety goggles, rubber gloves, as well as coveralls.
Personnel protection: Wear appropriate chemical protective gloves, boots and goggles.
Aprons should be used.
Octanol/Water Partition Coefficient:
log Kow= 0.08
Disposal Methods:
SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.
Adipic acid is a waste chemical stream constituent which may be subjected to ultimate disposal by controlled incineration.
The following wastewater treatment technologies have been investigated for adipic acid: Biological treatment.
Landfill, incineration: Material can be burned in an approved incinerator. ...
Use and Manufacturing
Use and Manufacturing:
Methods of Manufacturing
FROM CYCLOHEXANOL: BOUVEAULT, LOCQUIN, BULL SOC CHIM (4) 3: 438 (1908); ELLIS, ORG SYN COLL VOL (#1): 18 (2ND ED, 1941); FEAGEN, COPENHAVER, J AM CHEM SOC 62: 869 (1940); US PATENTS 2,191,786 (1940); 2,196,357 (1940); ZILBERMAN ET AL, J APPL CHEM (USSR) 29: 621 (1956).
BY ONE-STEP OXIDATION OF CYCLOHEXANE: ONOPCHENKO, SCHULZ, J ORG CHEM 38: 3729 (1973); TANAKA, 167TH AM CHEM SOC MEET (LOS ANGELES, MARCH-APRIL 1974) ABSTRACTS OF PAPERS, P 29. MANUFACTURER: FAITH, KEYES & CLARK'S INDUSTRIAL CHEMICALS, FA LOWENHEIM, MK MORAN, EDS (WILEY-INTERSCIENCE, NEW YORK, 4TH ED, 1975) PP 50-4.
Adipic acid can be prepared from acetylene and acetic acid in the presence of tert-butyl peroxide.
The predominant commercial route to adipic acid is via oxidation of cyclohexane in two processing steps. The first step involves oxidation of cyclohexane with air to form a mixture of cyclohexanone and cyclohexanol (termed ketone-alcohol, KA, or ol-one), followed by oxidation of the ketone-alcohol mixture with nitric acid to produce adipic acid. The balance of adipic acid is made from phenol by hydrogenation to cyclohexanol followed by similar nitric acid oxidation.
A patent describes a direct synthesis of adipic acid from butadiene by reaction under pressure with carbon monoxide and water (about 220 deg C) in the presence of a rhodium catalyst.
LAB PREPN FROM CYCLOHEXANONE: LF FIESER, ORGANIC EXPERIMENTS (HEATH, BOSTON, 1964) PP 106-8.

U.S. Exports
(1972) 1.95X10+9 G
(1975) 4.40X10+9 G
(1984) 2.52X10+10 g
(1987) 3,510,252 lb
CHEMICAL PROFILE: Adipic acid, Exports: 125 million pounds (1994)

U.S. Imports
(1972) 7.72X10+8 G
(1975) 4.3X10+8 G
(1984) 4.38X10+9 g
(1986) 12,356,621 lb
CHEMICAL PROFILE: Adipic acid, Imports: 110 million pounds (1994)

U.S. Production
(1972) 6.77X10+11 G
(1975) 6.10X10+11 G
(1985) 5.90X10+11 g
(1990) 1.62 billion lb
(1991) 1.70 billion lb
(1992) 1.56 billion lb
(1993) 1.56 billion lb

Consumption Patterns
80% for nylon 6,6 fibers; 5% for nylon 6,6 plastics; 4% for polyurethane resins; 4% for plasticizers and synthetic lubricants; 0.5% for food additives; 0.5% for misc applications including polyester resins (1971).
Nylon 6,6 fibers, 79%; Nylon 6,6 plastics, 8%; Plasticizers and synthetic lubricants, 4%; Polyurethanes, 7%; Other (includes food) 2% (1984).
CHEMICAL PROFILE: Adipic acid. Total nylon 66, 87% (reactant for nylon 66 fibers, 77%; reactant for nylon 66 resins, 10%); polyurethane resins, 4%: plasticizers, 3%; miscellaneous including food and polyester resin uses, 2%; exports, 3%.
CHEMICAL PROFILE: Adipic acid. Demand: 1985: 1.5 billion lb; 1986: 1.68 billion lb; 1987: 1.66 billion lb.
CHEMICAL PROFILE: Adipic Acid. Total nylon 6/6, 88% (reactant for nylon 6/6 fibers, 77%; reactant for nylon 6/6 resins, 11%); polyurethane resins, 3%; plasticizers, 2.5%; exports, 4.5%: miscellaneous, including food and polyester resin uses, 2%.
CHEMICAL PROFILE: Adipic acid. Demand: 1988: 1.64 billion lb; 1989: 1.65 billion lb; 1993 /projected/: 1.85 billion lb. (Includes exports, but not imports, which totaled 42 million lb last year.)
CHEMICAL PROFILE: Adipic acid, Demand: 1.8 billion pounds, 1994; 1.85 billion pounds, 1995; 2 billion pounds /projected/, 1999 (Demand is for the US and includes exports, which were 125 million pounds in 1994, but not imports which were 110 million pounds.)
CHEMICAL PROFILE: Adipic acid, Uses: Nylon 6/6, 85 % (fibers, 75%; resins, 10%); polyurethane resins, 8%; plasticizers, 3%; miscellaneous, including unsaturated polyester resins and food applications, 4%.
Usage:
Raw material for pharmaceuticals, perfume fixative.
Biomedical Effects and Toxicity
Biomedical Effects and Toxicity:
When ingested, it is apparently only partially metabolized in the human system, the balance being eliminated unchanged in the urine.
Environmental Fate and Exposure Potential
Environmental Fate/Exposure Summary:
TERRESTRIAL FATE: Based on a recommended classification scheme(1), an estimated Koc value of 26(SRC), determined from a measured log Kow of 0.08(2) and a recommended regression-derived equation(3), indicates that adipic acid is expected to have very high mobility in soil(SRC). Volatilization of adipic acid is not expected to be important from moist soil surfaces(SRC) given an estimated Henry's Law constant of 4.7X10-12 atm-cu m/mole(SRC) from its extrapolated vapor pressure, 7.4X10-7 at 30 deg C(4), and measured water solubility, 3.0X10+4 mg/l at 30 deg C(5). Adipic acid is not expected to volatilize from dry soil surfaces based on its extrapolated vapor pressure(4). Biodegradability screening tests indicate that adipic acid is readily biodegradable(SRC). An 84% conversion of adipic acid's carbon content to carbon dioxide was observed after 30 days aerobic incubation in soil biometer flasks at an initial adipic acid concn of 1 mg/g soil(6).
AQUATIC FATE: Based on a recommended classification scheme(1), an estimated Koc value of 26(SRC), determined from a measured log Kow of 0.08(2) and a recommended regression-derived equation(3), indicates that adipic acid is not expected to adsorb to suspended solids and sediment in water(SRC). Adipic acid is not expected to volatilize from water surfaces(3,SRC) based on an estimated Henry's Law constant of 4.7X10-12 atm-cu m/mole(SRC) from its extrapolated vapor pressure, 7.4X10-7 mm Hg at 30 deg C(4), and measured water solubility, 3.0X10+4 mg/l at 30 deg C(5). Adipic acid's pKa's of 4.44 and 5.4(6) indicate that adipic acid will exist predominately in the ionized form under environmental pHs(SRC). Volatilization of the ionized form from water surfaces is not expected to be an important fate process(SRC). According to a classification scheme(7), an estimated BCF value of 0.68(3,SRC), from a measured log Kow(2), suggests that bioconcentration in aquatic organisms is low(SRC). Biodegradability screening tests indicate that adipic acid is readily biodegradable(SRC). Adipic acid was rapidly degraded in a river die-away test using Main River (Germany) water; 50% and 90% degradation being achieved in 3.5 and 7 days, respectively, at concn levels of 700 mg/l(8).
ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), adipic acid, which has an extrapolated vapor pressure of 7.4X10-7 mm Hg at 30 deg C(2), will exist in both the vapor and particulate phases in the ambient atmosphere. Vapor-phase adipic acid is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC); the half-life for this reaction in air is estimated to be about 2.9 days(3,SRC). Particulate-phase adipic acid may be physically removed from the air by wet and dry deposition(SRC).
Chemical Company
GUANGZHOU WOW ELECTRONICS TECHNOLOGY CO., LTD:
Guangzhou WOW Electronics Technology CO.,LTD.is a manufacturer of intelligent electric scooter with well-equipped testing facilities and strong technical support by R&D department. With a wide range,Website:http://www.onanskateboard.com, good quality, reasonable prices and stylish designs, our products are extensively used in personal transportation, public security police, metro deployment, airport customs, large venue, tourist resort, golf court and other industries. Based on our commitment to quality excellence, our products meet international market standards. We look forward to entering into a profitable relationship with you in the future. 
Shenzhen pincentre Craft&Gift company:
Shenzhen pincentre Craft &Gift company are located in shenzhen ,Website:http://www.pincentre.com, china. Our factory ?have focus on metal Craft &Gift for 10 years. Our Main product including badge/lapel pin , medal , trophy , cufflinks . And we also make car emblems, commemorative coin(challange coin), tie clip, bottle opener , keychain ,souvenir plate, Belt Buckle, bookmark ,plaques and other metal product . Our factory employs more then 100 worker . We own professional staff and advanced equipments, including CNC die carving machine .1000T oil hydraulic press. 88T*2 Die casting machine and various punching machines. Our QC department will make sure all the goods are qualified before send out.? We firmly believe we are not only sell goods , more important we also sell service. NO Good Ser 
LAIZHOU DATANG MACHINERY CO., LTD:
Laizhou Datang Machinery Technology Co., Ltd is a large-scale comprehensive enterprise engaged in stone machinery with R&D,Website:http://www.datangmachine.com, manufacture, sales and service. The Company is located in Xiaqiu Town Laizhou City, the largest stone material processing machines manufacturer in Northern China with convenient transportation and superior geographical position. In Xiaqiu town,here are about 3000 factories to process stone material and supply kinds of marble ,granite slab, sculpture. Datang machinery is the famous brand stone processing machines in China’s stone industry. The Company mainly produces a total of more than 30 types of stone processing equipment, including CNC grinding machine, multi-blades block cutting machine, large and middle infrared bridge cuttin 
Yantai Jinyuan Mining Machinery Co., Ltd:
Yantai Jinyuan Mining Machinery Co., Ltd. (Herein abbreviated as “Yantai Jinyuan”) is located in APEC Industrial Park of Yantai,Website:http://www.mineralprocessing-epc.com, occupying an area of 36,000m2 and possessing the constructed area of 20,000 m2.. With the advanced processing equipment, Yantai Jinyuan is a specialized company integrated with test, technological design, equipment manufacture, installation and debugging, and personnel training as well. It has powerful technical force, personnel with senior and middle technical titles accounting for over 30% of the total staff, and over 70% of the management personnel. Following the advanced management methods and flexible marketing strategy, Yantai Jinyuan has been developing rapidly and ranks on the top of the mining industry, taking 
XIAMEN NOVELTY FLAG CO.,LTD:
About Xiamen Novelty Flag Co., Ltd.? Since 1999,Website:http://www.custom-flags-makers.com, NoveltyFlag have been engaged in flags, banners, flagpole, display, sings and series of accessories. We are very pround to say that we are supplying flags all over the world. We use the latest printing technology for silk screen printing and dye sub printing. Our workers are very skilled in the flag industry. A lot of them have been making flags for over 20 years. Our main market for our custom flags is here in European countries, United States, Canada. Other markets we supply to Australia, South Africa, Nigera and Aisa. We strive to make every customer who comes to us feel special by working together with them from start to finish, ensuring they are completely satisfied with all aspects from the f 
Qingdao Singsino Group Limited:
our organization Singsino Group Limited was built-in 1977, As you manufacturer and exporter, we are recognized to clients for the pharmaceutical materials and Food chemicals.our primary items are listed below, pls kindly check them.1. corn starch 2. dextrose monhydrate 3. dextrose anhydrous 4. sorbitol powder 5. solution 70% 6. mannitol 7. sodium gluconate 8. xanthan gum we have six plants and nine domestic sales offices in china, and export to greater than 80 nations since 1998.we pass gmp, HACCP, Halal, KOSHER, ISO, ip gmo-free etc. Certifications. 
Beijing Century Richap Chemistry Co.,Ltd:
 
Liaoning EO Technology Co., Ltd.:
EOMonitoring belongs to Liaoning EO Technology which is specialized in export business since 2002.We have more than 300 employees and 2000㎡office. We cooperated with fixed more than 100 factories till now. All the oversea sales supported client need to have at least 3 years experience of oversea trade and profession in his field well. Website:http://www.eomonitoring.com 
Tianjin Topwork Fine Chemical Co.,Ltd:
 
SUZHOU HENGXIANG MEDICAL DEVICE CO.,LTD:
Suzhou Hengxiang Medical Device Co.,Ltd is a company specilizing in manufacturing and trading syringe,Website:http://www.sinomedevice.com,suture,vaccum blood collection tube and blood lancet.We have more than 300 employees including 20 R&D staffs. The sales headquarter of the company is located in Suzhou and its manufacturing plant covers an area of 10,000 square meters among which a 1,500 square meters of clean shop is included. Our company is mainly dedicated to R&D, design, manufacture and sales of medical dressing Our products were widely sold to the markets like Europe, North America, Latin America, Africa,Middle East and Southeast Asia with annual sales revenue more than USD 30 million. Our products mainly include syringe(common syringe,auto-destroy syringe and safety syringe),sutu 
TIANJIN WORLDS VALVE CO.,LTD38121:
IANJIN WORLDS VALVE CO.,Ltd. is really a professional manufacturer of valves and Focused on design, Manufacture, Marketing and service etc. The key items contain concentric line butterfly valve, double flanged butterfly valve, PTFE lining butterfly valve, gate valve, check valve, globe valve and Other series items. Valves could be designed and produced in compliance with assorted standards, for example API, ISO, DIN, JIS, as, AWWA and Baloney Standards etc. The annual production capacity is capable of greater than 2000 tons. All items mostly are released to Europe and North & South Amercia and other nations, and they're broadly utilized in water supply and draining, Energy generation, oil, chemical industry, metallurgy and other industries. Our items are unique in design, superior quality  
Shandong Hongxiang Zinc Co., Ltd:
profile: Shandong Hongxiangzinc Co., Ltd imports and exports all sorts of zinc, whitened carbon black, Foot rubber active agents, oxygen, rubber and PVC tubes. Our products includes direct & indirect zinc, oxygen line & rubber tube special zinc and nanometer, active & feed zinc. 
Tianjin Ji Ao Chemical Co.,Ltd:
 
东莞市天翊网络科技有限公司:
 
Colourmax Printing:
Colourmax Printing has made card printing and promotional products the foundation of our business. We are committed to provide you with print and branding solutions that grow your business. As the world of business evolves,Website:http://www.colourmaxprintings.com/, so too does the range of our products and services. Today, we offer a single source for all your print and branding needs. Our printing factory occupied a floor area of over 20,000 square feet with all advance production equipment and assembly machines in our main production plant. With over 200 experienced technical and led by our experienced management team, we have a total quality management system to support our effective and efficient production process.  
Jinan Boying Flame Retardant Material Company:
 
D K Pharma Chem Pvt Ltd:
 
Dongguan Huajin Gifts Com.,Ltd.:
Welcome to Dongguan HUAJIN Gifts Co.,Ltd,Website:http://www.meiledimusic.com, let us take you into the WORLD of musical instrument straps, with Fashion and comfort. Huajin is one of key manufacturer of guitar strap and musical instruments strap, with integration of research, development, and manufacturing. We diversify the design as the theme, with comfort, fashion, durability and other elements. Company Products with good design, exquisite workmanship, safety and durability , most popular both at china and foreign clients. “Huajin”, “Kinglong”, “Melody” , they are company’s brands, company adheres to the “ Quality to win credibility , innovation seeks development." Our commitment to customers: good quality, competitive price, to ensure order delivery in time! Our aim: quality first, inno 
YUHUAN SHENGHONGFA NC ENGRAVING EQUIPMENT CO., LTD:
Our History Sheng Hong Fa is a successful manufacturer and supplier,Website:http://www.shenghongfacnc.com, we have devoted ourselves to engraving machine of a top quality for over 10 years in China. We are engaged in the research, development and production of many kinds of CNC engravers, engraving and cutting machines. And has researched and developed independently the system of Four-Axis for wood engraving, also developed the software of Four-Axis for wood carving. Today, our company has been one of the top producers of engraving machine. Our Factory Sheng Hong Fa is located in China Yuhuan, a coastal city, which is quite convenient to transform the goods. Since the foundation, our factory has been adhering to the policy of "quality based and business prospered by credit brand", constant 
XIAMEN QUAN STONE IMPORT & EXPORT CO.,LTD DN:
Kquartz is a brand of Quan Stone Established in 2009,Website:http://www.kquartz.nl, we supply both Man-Made and Natural Stone products. Our main product is?Engineered Quartz Stone?in slab of size of 300x140cm and 320x160cm, also tile in size 600mmx600mm or other sizes as per client request. The thickness can be 12mm, 15mm, 20mm and 30mm. Our monthly production is 50,000 square meters. We also supply?Composite Marble?in Slab of size 320x160cm or 300x120cm and tile in size 800mmx800mm or other sizes as per client request. Monthly production can reach to 100,000 square meters. Our Natural Stone products are kitchen Countertop and Bathroom vanity top, Strip, Stair, Window Sill, Column and other special works as per client designs. We have SGS Certificate and Reaction to Fire Text Reports issu