Sulfamic acid

Name : Sulfamic acid
English Name : ACETO ACID; AMIDOSULFONIC ACID; AMIDOSULFURIC ACID; AMINOSULFONIC ACID; BETZ 0254; SULFAMIDIC ACID; SULFAMINIC ACID; SULPHAMIC ACID; aminosulfuricacid; Imidosulfonic acid; Jumbo; Kyselina amidosulfonova; Kyselina sulfaminova; kyselinaamidosulfonova; kyselinaamidosulfonova (czech); kyselinasulfaminova; kyselinasulfaminova (czech); sulfamic; sulphamidic acid
Grade : AR
CAS No. :5329 -14-6 [ 1 ]
Formula : H3NO3S
Weight: 97.09

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No. MDL: MFCD00011603
EC Number: 226-218-8
2 Products
Raw materials : urea, fuming sulfuric acid, chlorosulfonic acid
Preparation Products : cobalt sulfamate , nickel sulfamate , Acid Green 20 , cyclamate, detergents, alkali superplasticizer , affinity of the toner , ammonium sulfamate , strong detergents , cleaning agents
Characters
Colorless or white crystals , soluble in water, slightly soluble in ethanol and methanol, slightly soluble in acetone, ether insoluble in aqueous solution gradually break down into ammonium bisulfate , water solubility :. 146.8 g / l (20 ℃)
Physical parameters
Melting point : 215-225 ℃
Storage and transportation
Sealed dry place.
Instructions for use
Standard amount of the base titration , complexation masking agents , organic trace analysis of nitrogen and sulfur determination criteria .
Hazard statement
Dangerous code : Xi
Hazard Class : R36/38- R52/53
Security Level : S26-S28-S61
3 Synthetic Method
An amino acid produced in many ways, sulfur dioxide or acetone oxime with hydroxylamine as raw material hydroxylamine , sulfite or sulfate and ammonia as raw materials ammoniting , urea and chlorine acid as raw materials sulfochlorination law , fuming sulfuric acid and urea as raw fuming sulfuric acid , urea , sulfur trioxide and sulfuric acid as raw materials and fuming sulfuric acid method (also known as liquid phase ) and ammonia via gasification and sulfur trioxide in Gas under vapor phase reaction conditions and the like. Domestic and industrial significance of the process has to send two amination with ammonia and direct synthesis of sulfur trioxide fuming sulfuric acid method. Urea is sulfonated with fuming sulfuric acid to form an amino acid in the crude 40-70 ℃, and then water was added for crystallization to obtain the amino acid product. Consumption of raw materials fixed: Urea 2000kg / t, oleum 1500kg / t.
2 , there are two main methods synthesis gas and liquid method. Fumed harsh operating conditions , equipment material requirements . Byproducts and more easily adhere to the amino acids and the reactor wall need regular cleaning. High production costs . The advantage is the high product purity. Manufacturers use mostly liquid phase .
3 excess fuming sulfuric acid in the reaction vessel , cooled with stirring to 20 ~ 40 ℃, start adding the mixed proportion of urea and sulfuric acid . After completion of the addition , stirring at about 20 ℃ 8 h. Then gradually warmed to 70 ~ 90 ℃, distilled sulfur trioxide , cooling crystallization . The crude obtained after the solid-liquid share amino acid, and recrystallized from water , dehydrated and dried to obtain a high-purity quality amino acid.
Four amino acid is a strong Lewis acid and a strong Lewis base NH3 SO3 adduct , prepared a small amount of high purity when the amino acid , in a completely anhydrous conditions , with high purity directly by reaction with ammonia SO3 . If a larger amount of urea is available with fuming sulfuric acid reaction to the system. The round bottom flask equipped with a mechanical stirrer was placed in the water bath , to which was added 560g 100% sulfuric acid under vigorous stirring to 100g of urea times ( about 45min plus End ) was slowly added to sulfuric acid , being careful not the temperature exceed 40 ℃. Then thereto was added 309g of fuming sulfuric acid ( containing 65 % free SO3), and 16h is placed at a temperature of 42 ~ 45 ℃ . Filtered through a glass frit funnel the reaction mixture was washed first with pure sulfuric acid , washed with 50% sulfuric acid , washed with cold methanol and finally with .
5 heating oleum 20% to 30 ℃, urea was slowly added , the temperature controlled at 60 ~ 65 ℃, after adding heat 3H, then warmed to 80 ~ 85 ℃, incubated 2h, after the reaction was cooled to 5 ℃, filtration, drying the obtained crystals by centrifugation , washed with 5% ethanol and recrystallized with distilled water and drained after purification to obtain pure amino acid .

Polyvinyl alcohol

Polyvinyl Alcohol

Chemicals Name : polyvinyl alcohol, vinylalcohol polymer, poval, referred to as PVA
CAS No. :9002-89-5
Formula : [C2H4O] n
Molecular weight:  44.05
Structure:Non-toxic
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1,Security terms : S24/25 Avoid contact with skin and eyes Avoid contact with skin and eyes.
S26In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37Wear suitable protective clothing and gloves.
Wear suitable protective clothing and gloves.
S24/25Avoid contact with skin and eyes.
Avoid contact with skin and eyes.
S45In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
In case of accident or feel unwell, seek medical advice immediately ( if possible show the label ) .
Risk Phrases R23/24/25Toxic by inhalation, in contact with skin and if swallowed.
Inhalation , in contact with skin and if swallowed poisonous.
2, Technical indicators
Polyvinyl alcohol product standards (cp2010)
No.                      Index Name                    Standard
1                         Exterior                       White powder
2                      Viscosity                        3-70
3                     PH value                        4.5 ~ 6.5
4                   Loss on drying                  ≤ 5.0
5             Residue on ignition                 ≤ 0.5
6                    Acid value                        ≤ 3.0%
7                Alcoholysis                          85 ~ 89
8             Heavy Metal                       ≤ 10PPM
Polyvinyl alcohol product standards (USP25)
Low viscosity
No.                       Index Name                       Standard
1                              Exterior                         White powder
2                          Viscosity                           4.0 ~ 7.0
3                         PH value                           5-8
4       The average molecular weight        16000 to 20000
5                  Loss on drying                         ≤ 5.0
6               Residue on ignition                     ≤ 2.0
7           Water- insoluble impurities              ≤ 0.1%
8             The degree of hydrolysis                +
9              Organic volatile impurities              +
10                 Content                             85.0% ~ 115.0%
Medium viscosity
No.                              Index Name                       Standard
1                                      Exterior                    White powder
2                                    Viscosity                       21.0 ~ 33.0
3                                  PH value                              5-8
4                 The average molecular weight           110000 ~ 130000
5                           Loss on drying                           ≤ 5.0
6                       Residue on ignition                       ≤ 2.0
7                Water- insoluble impurities                 ≤ 0.1%
8              The degree of hydrolysis                    +
9         Organic volatile impurities                      +
10                  Content                               85.0% ~ 115.0%
High viscosity
No.                                 Index Name                                            Standard
1                                      Exterior                                             White powder
2                                    Viscosity                                               40.0 to 65.0
3                                  PH value                                                     5-8
4                   The average molecular weight                       180000 to 200000
5                            Loss on drying                                                  ≤ 5.0
6                  Residue on ignition                                                    ≤ 2.0
7               Water- insoluble impurities                                           ≤ 0.1%
8                  The degree of hydrolysis                                         +
9                 Organic volatile impurities                                        +
10                         Content                                                     85.0% ~ 115.0%
3, Pharmaceutical Grade
Pharmaceutical grade and specifications with EG , EG system uses. Pharmaceutical grade polyvinyl alcohol , polyvinyl alcohol level is different from the chemical industry , it is a very safe organic polymer , non-toxic to humans , no side effects, biocompatible , water-based gel , especially if he ‘s in medical in ophthalmology , wound dressings and artificial joints aspects are widely used in pharmaceutical polyvinyl alcohol film while the film , an artificial kidney film also has to use. Its security can be used to repair skin wounds , eye drops and eye products visible in general. Some models are also often used in cosmetics mask, cleanser , lotion and emulsion , is a commonly used security into film.

4,Risk
Health hazard : inhalation , ingestion or absorption through the skin harmful to eyes and skin

Stimulation.
Explosion hazard: The product is flammable , irritating.

5,Aid measures
Skin contact: Remove contaminated clothing, mobile water rinse .
Eye contact: Did eyelid, mobile water or saline. Doctor.
Inhalation: from the scene to fresh air. If breathing is difficult , give oxygen. Doctor.
Ingestion : drink plenty of water, induce vomiting . Doctor.
6, Fire-fighting measures
Hazardous characteristics : powder can form explosive mixtures with air , when it reaches a certain concentration, when Mars will explode. The thermal decomposition of flammable gases.
Hazardous combustion products : carbon monoxide, carbon dioxide.
Fire fighting methods : firefighters are required to wear gas masks, body wear firefighting suits , fire in the wind . Extinguishing Media: Water spray, foam, dry powder , carbon dioxide , sand.
7 leak handling
Emergency treatment: isolation leak contaminated areas, restricting access. Cut off the fire source . Recommended emergency personnel wearing a dust mask ( full cover ) , wear protective clothing. To avoid dust, carefully scan, bag placed transfer to a safe place . You can also rinse with plenty of water , wash water diluted into the wastewater system . If large spills, using plastic sheeting, canvas cover . Recycling or collection shipped to the waste disposal sites.
8, Handling
Handling Precautions: provide good natural ventilation.

The operator must go through specialized training , strict adherence to rules . Proposed operators wear self-absorption filter respirators , wearing chemical protective safety glasses , wear protective overalls on infiltration , wear rubber gloves. Away from fire , heat, workplace smoking . Use explosion-proof ventilation systems and equipment. Avoid generating dust . Avoid contact with oxidizing agents . Handling of light when light unloading , packaging and containers to prevent damage . Corresponding with the variety and quantity of fire equipment and emergency equipment leakage . Empty containers may be harmful residues .
Storage: Store in a cool , ventilated warehouse. Keep away from fire and heat. Oxidants should be stored separately and avoid mixing reservoir . Corresponding with the variety and quantity of fire equipment . Storage areas should be equipped with suitable material spill .

Diazolidinylurea information

1 Basic information Chinese Name: Diazolidinyl Urea Chinese alias: N- (1,3- 2,5-bis (hydroxymethyl)-dione-4-imidazolyl group) -N, N’- two methylol urea; two azo Lee Ting urea; two dual chlorine alkyl urea; Pierre B; N- hydroxymethyl -N- (1,3- dimethylol-2,5-dione-4-imidazolyl group) -N’- methylol urea; diazo imidazolidinyl urea; Pierre A; bis (hydroxymethyl) imidazolidinyl urea; Pierre 115 (imidazolidinyl urine) English Name: Diazolidinyl urea English Synonyms: DIAZOLIDINYL UREA; N- (1,3-Bis (hydroxymethyl) -2,5-dioxo-4-imidazolidinyl) -N, Asics Pas Cher N’-bis (hydroxymethyl) -urea; germall11; hyl) -; imidazolidinylurea11; n – (1,3-bis (hydroxymethyl) -2,5-dioxo-4-imidazolidinyl) -n, n’-bis (hydroxymethyl; n- (hydroxymethyl) -n- (1,3-dihydroxymethyl-2,5- dioxo-4-imidazolidinyl) -n ‘- (hyd; N- (Hydroxymethyl) -N- (1,3-dihydroxymethyl-2,5-dioxo-4-imidazolidinyl) -N’ – (hydroxymethyl) urea; roxymethyl) urea ; urea, n- (1,3-bis (hydroxymethyl) -2,5-dioxo-4-imidazolidinyl) -n, n’-bis (hydroxymet; urea, nike tn requin pas cher n- [1,3-bis (hydroxymethyl) -2 , 5-dioxo-4-imidazolidinyl] -n, nike air max 2016 blauw n’-bis (hydroxymet; Urea, N- [1,3-bis (hydroxymethyl) -2,5-dioxo-4-imidazolidinyl] -N, N’-bis (hydroxymethyl) -; 1- [1,3-bis (hydroxymethyl) -2,5-dioxoimidazolidin-4-yl] -1,3-bis (hydroxymethyl) urea; MicrocideIvtm; Germall; N- (HYDROXYMETHYL) -N- (1,3-DIHYDROXYMETHYL-2,5-DIOXO-4-IMIDA .; DIAZOLIDINYLUREA (GERMALL II); 1,3-Bis (hydroxymethyl) -5- [1,3-bis (hydroxymethyl) ureido] hydantoin; Germall Ⅱ CAS: 78491-02-8 Formula: C8H14N4O7 Molecular Weight: 278.22 2 Physical and chemical properties Appearance: white powder, hygroscopic, nike air max pas cher odorless or with a characteristic odor. Storage condition: 2-8 ° C 3 uses Diazolidinyl Urea Used in cosmetics, food processing and animal feed industries,

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U.S. new ethylene cracker production will reach 10

American Plastics News Network News, The Dow Chemical Company executives said, thanks to shale gas in North America to bring the advantages of raw material supply, the U.S. petrochemical market is being ushered in four wave of investment wave.
Dow Jim Fitterling at IHS World Petrochemical Conference, held March 26 in Houston, said: “Investing tide may be much larger than we expected.”, Former U.S. announced at least 120 energy-related chemical expansion project an investment of over 100 billion U.S. dollars.
Petrochemical companies in the United States have announced new production of ethylene cracker reached 10, including a unit of Dow’s Freeport, Texas in the United States. Fitterling estimated that 6 will be completed as scheduled. He added that this investment demonstrates the range of investment theory investors. Dow’s Freeport project will add a lot of polyethylene capacity.(chemicals offer)

Gong Li : China’s methanol production capacity is not excess

- Interview with Canadian methanol Corporation CFO tribute force
“We’re just two weeks ago to buy more than 1,000 acres of land to build at least 10 annual output of 1.8 million tons of methanol plant , the target market is China .” At a reception held at the Canadian Embassy on March 20 , reporters met Canadian methanol Corporation (CMC) CFO tribute force , but also remember his words . Continue reading →

Butyl Paraben identification

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3,5 – xylenol HANDLING AND STORAGE

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U.S. China hydroxy ethylidene diphosphonic acid preliminary anti-dumping administrative review

March 25, 2014 , the U.S. Department of Commerce in China hydroxy ethylidene diphosphonic acid preliminary anti-dumping administrative review : Shandong Taihe Chemical Company (. Shandong Taihe Chemicals Co, Ltd) dumping margin of 43.58 percent .
June 3, 2013 , the U.S. Department of Commerce in China hydroxy ethylidene diphosphonic acid administrative review of anti-dumping investigation , the investigation period of April 1, 2012 – March 31, 2013 , involving customs codes for 29,310,090.43 .(http://www.lubonchem.com supply)

WTO Dispute Chinese Rare Earth ” first instance ” loser

March 26 , World Trade Organization (WTO) panel report released ruled export tariffs on Chinese rare earths, tungsten, molybdenum related products taken quota management measures violate WTO regulations. Chinese Commerce Department of Treaty and Law Department official has issued a statement said that China is currently evaluating the report panel decisions and make proper follow-up to the case under the WTO dispute settlement procedures . Continue reading →