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Sulfamic acid(CAS No. 5329-14-6)

Sulfamic acid H3NO3S (cas 5329-14-6) Molecular Structure

5329-14-6 Structure

Identification and Related Records

【Name】
Sulfamic acid
【Iupac name】
sulfamic acid
【CAS Registry number】
5329-14-6
【Synonyms】
sulphamic acid
Amidosulfonic acid
Amidosulfuric acid
Aminosulfonic acid
【EINECS(EC#)】
226-218-8
【Molecular Formula】
H3NO3S (Products with the same molecular formula)
【Molecular Weight】
97.09
【Inchi】
InChI=1/H3NO3S/c1-5(2,3)4/h(H3,1,2,3,4)
【InChIKey】
IIACRCGMVDHOTQ-UHFFFAOYSA-N
【Canonical SMILES】
NS(=O)(=O)O
【MOL File】
5329-14-6.mol

Chemical and Physical Properties

【Appearance】
White crystalline solid.
【Density】
2.126g/cm3
【Melting Point】
215-225℃
【Boiling Point】
247℃
【Refractive Index】
1.553
【Flash Point】
205℃
【Water】
146.8 g/L (20℃)
【Solubilities】
146.8 g/L (20 °C) in water
【Color/Form】
Orthorhombic crystals.
White crystalline solid.
Granular grade is off-white in color.
【Stability】
Stable.
【HS Code】
28111980
【Storage temp】
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
【Spectral properties】
1.553, alpha form; 1.563, beta form; 1.568, gamma form
【Computed Properties】
Molecular Weight:97.09372 [g/mol]
Molecular Formula:H3NO3S
XLogP3-AA:-1.6
H-Bond Donor:2
H-Bond Acceptor:4
Rotatable Bond Count:0
Exact Mass:96.983364
MonoIsotopic Mass:96.983364
Topological Polar Surface Area:88.8
Heavy Atom Count:5
Formal Charge:0
Complexity:92.6
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:3
Feature 3D Donor Count:1
Feature 3D Anion Count:1
Effective Rotor Count:0
Conformer Sampling RMSD:0.4
CID Conformer Count:1

Safety and Handling

【Hazard Codes】
Xi:Irritant
【Risk Statements】
R36/38;R52/53
【Safety Statements 】
S26;S28;S61
【HazardClass】
8
【Safety】

Hazard Codes:IrritantXi
Risk Statements: 36/38-52/53
R36/38:Irritating to eyes and skin.
R52/53:Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 26-28-61-28A
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S28:After contact with skin, wash immediately with plenty of soap-suds.
S61:Avoid release to the environment.
S28:After contact with skin, wash immediately with plenty of soap-suds.
RIDADR: UN 2967 8/PG 3
WGK Germany: 1
RTECS: WO5950000
HazardClass: 8
PackingGroup: III
HS Code: 28111980

【PackingGroup 】
III
【Skin, Eye, and Respiratory Irritations】
Dust or solution irritates the eyes, skin and mucous membranes. Prolonged exposure of skin to the acid may cause irritation.
【Cleanup Methods】
Wear eye protection, laboratory coat and nitrile rubber gloves. Clean up with dust pan and brush. May be flushed away to waste with at least 50 vol of water or mixed with sand and disposed or as normal refuse.
【Transport】
UN 2967
【Fire Fighting Procedures】
If material on fire or involved in fire: Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use dry chemical, dry sand, or carbon dioxide. Do not use water on material itself. If large quantities of combustibles are involved, use water in flooding quantities as spray and fog.
【Formulations/Preparations】
99.5% Crystal or granular technical grades
Typical analysis in 1981 of the E.I. du Pont de Nemours & Co. Inc products: 99.7% Crystal grade, 92.2% Granular grade
【DOT Emergency Guidelines】
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Health: TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Fire or Explosion: Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Public Safety: CALL Emergency Response Telephone Number. As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. Keep unauthorized personnel away. Stay upwind. Keep out of low areas. Ventilate enclosed areas.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Evacuation: Fire: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Fire: Small fires: Dry chemical, CO2 or water spray. Large fires: Dry chemical, CO2, alcohol-resistant foam or water spray. Move containers from fire area if you can do it without risk. Dike fire control water for later disposal; do not scatter the material. Fire involving tanks or car/trailer loads: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Do not get water inside containers. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ Spill or Leak: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
/GUIDE 154: SUBSTANCES - TOXIC AND/OR CORROSIVE (NON-COMBUSTIBLE)/ First Aid: Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin. Keep victim warm and quiet. Effects of exposure (inhalation, ingestion or skin contact) to substance may be delayed. Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves.
【Reactivities and Incompatibilities】
Chlorination of amidosulfuric acid or acidic ammonium chloride solutions gives the powerfully explosive oil nitrogen trichloride.
Heating mixtures of barium, potassium or sodium amidosulfates or amidosulfuric acid, with sodium or potassium nitrates or nitrites, leads to reactions which may be explosive.
Mixing with fuming nitric acid results in violent release of nitrous oxide.
【Other Preventative Measures】
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.
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.
Personnel protection: Avoid breathing dusts, and fumes from burning material. Avoid bodily contact with the material. If contact with the material anticipated, wear appropriate chemical protective clothing.
【Protective Equipment and Clothing】
Dust or solution irritates the eyes, skin and mucous membranes. Prolonged exposure of skin to the acid may cause irritation.
【Specification】

?Sulfamic acid , its cas register number is 5329-14-6. It also can be called?Amidosulfonic acid ; Amidosulfuric acid ; Aminosulfonic acid .It is a?white crystalline solid.It?reacts exothermically with bases. Aqueous solutions are acidic and corrosive.

【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.
Package Lots: Place in a separate labeled container for recycling or disposal by burning in a furnace equipped with an afterburner and scrubber. Small Quantities: Wear eye protection, laboratory coat and nitrile rubber gloves. Work in the fume hood. Sift slowly into a large container of cold water, with agitation. When dissolved, neutralize with sodium carbonate and pour into drain with at least 50 times its volume of water.

Use and Manufacturing

【Use and Manufacturing】
Methods of Manufacturing

REACTION OF UREA, SULFUR TRIOXIDE, AND SULFURIC ACID
OBTAINED FROM CHLOROSULFONIC ACID & AMMONIA, OR BY HEATING UREA WITH SULFURIC ACID.
U.S. Imports

(1972) 2.39X10+9 G
(1975) 2.94X10+9 G
【Usage】

As standard in alkalimetry, in acid cleaning, in nitrite removal, in chlorine stabilization for use in swimming pools, cooling towers, paper mills.

Biomedical Effects and Toxicity

【Pharmacological Action】
- Pesticides used to destroy unwanted vegetation, especially various types of weeds, grasses (POACEAE), and woody plants. Some plants develop HERBICIDE RESISTANCE.
- Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant & Hackh's Chemical Dictionary, 5th ed, p301, p499)

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