Ammonium chloride is toxic

Ammonium chloride

Synonyms:Ammonium muriate, ammonia salt
Chemical formula:NH4Cl
Molecular weight:53.5
CAS no .:12125-02-9
RTECS no .:BP4550000
EU no .:017-014-00-8
EINECS no .:235-186-4
Hazard symbols:
Environmental hazards: Slightly hazardous to water (WGK 1).
EU classification:Xn
R-phrases:22-36
S-phrases:(2-)22
Occupational exposure limit values:TLV as smoke: - ppm; 10 mg / m3 (TWA); 20 mg / m3 (STEL) (ACGIH 1993/94). MAK value not established (1997)
Sublimation point:350 ° C
Relative density (water = 1):1.5
Solubility in water:Well

Properties: The white hygroscopic crystals or the powder are not flammable. With silver salts, shock-sensitive compounds are formed. When heated, when burned and when it comes into contact with concentrated acids or strong bases, the substance decomposes and forms corrosive, toxic vapors (ammonia, hydrogen chloride, nitrogen oxides). In an aqueous solution, the substance is a weak acid. A violent reaction occurs with ammonium nitrate and potassium chlorate. There is always an acute risk of fire and explosion. Copper and copper alloys are attacked.

Symptoms: The substance can be inhaled or ingested and is irritating to the skin, the eyes and the respiratory tract. Toxic contamination of the air occurs very quickly at a temperature of 20 ° C. Effects on the eyes and / or skin can be recognized by reddening and pain. Oral ingestion leads to nausea, vomiting and sore throat. Inhalation leads to a cough.

Activities: Rescue the patient from the contaminated environment with self-contained breathing apparatus. Each patient receives at least four liters of oxygen per minute. Remove contaminated clothing and flush the affected skin with plenty of water. If the eye is affected, it must be anesthetized and carefully rinsed. All further measures are symptomatic.

Precautions: The skin and eyes must be protected with suitable protective materials. In terms of personal protection, the breathing apparatus must have at least one P2 filter.