Sulfamic acid

  • Amidosulfonic acid
  • Amidosulfuric acid
  • Scale Cleen
  • Alprojet W
  • Jumbo
Formula
H2NSO3H
Structure
Description
A white crystalline solid.
Uses
As standard in alkalimetry, in acid cleaning, in nitrite removal, in chlorine stabilization for use in swimming pools, cooling towers, paper mills.

Registry Numbers and Inventories.
CAS
5329-14-6
EC (EINECS/ELINCS)
226-218-8
EC Index Number
016-026-00-0
EC Class
Irritant; Dangerous for the Environment
R 36/38 52/53
S 26 28 61
RTECS
WO5950000
RTECS class
Agricultural Chemical and Pesticide; Primary Irritant
UN (DOT)
2967
Merck
12,9090
Beilstein/Gmelin
25628 (G)
EPA OPP
78101
Swiss Giftliste 1
G-1018
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
H3NO3S
Formula mass
97.09
Melting point, °C
205
Boiling point, °C
247
Vapor pressure, mmHg
0.006 (20 C)
Vapor density (air=1)
3.3
Density
2.15 g/cm3 (20 C)
Solubility in water
213 g/L (20 C)
Partition coefficient, pKow
-0.95
Heat of fusion
11.9 kJ/mol
Heat of combustion
-1530 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
14
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong bases.
Decomposition
Nitrogen oxides, oxides of sulfur, irritating and toxic fumes and gases, ammonia and/or derivatives.

Fire.
Flash Point,°C
205
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Use extinguishing media most appropriate for the surrounding fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
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.
Combustion products
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
3
Exposure effects
Chronic inhalation and ingestion may cause effects similar to those of acute inhalation and ingestion. Effects may be delayed.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
May cause respiratory tract irritation. Can produce delayed pulmonary edema.
   Skin
Causes skin irritation. Contact with the liquid or high concentration of vapors may cause blistering of the skin. Concentrated solutions may produce corrosive effects.
   Eyes
Causes eye irritation. Concentrated solutions may produce corrosive effects. May cause chemical conjunctivitis.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
2967
Response guide
Hazard class
8
Packing Group
III
 
HS Code
2811 19 80
 
Std. Transport #
4932374