Potassium carbonate sesquihydrate

Formula
2K2CO3 . 3H2O
Description
Colorless, granular crystals

Registry Numbers and Inventories.
CAS
6381-79-9
EC (EINECS/ELINCS)
209-529-3
EC Class
irritant
R 36/37/38
Beilstein/Gmelin
183685 (G)
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
2CK2O3.3H2O
Formula mass
330.46
Melting point, °C
891
Density
2.29 g/cm3
Solubility in water
1300 g/L (20 C)

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Avoid breathing dust, vapor, mist, or gas. 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, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
14
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Moisture, strong oxidizing agents, acids.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, oxides of potassium.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Material will not burn. 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.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
4 (Substances and products that must be considered harmful)
Exposure effects
   Ingestion
May cause irritation of the digestive tract.
   Inhalation
Causes an irritant and caustic action similar to potassium hydroxide but less severe.
   Skin
Causes an irritant and caustic action similar to that of potassium hydroxide.
   Eyes
Causes an irritant and caustic action similar to that of potassium hydroxide.

First aid
 
   Ingestion
Do NOT induce vomiting. 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
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
HS Code
2836 40 00