Potassium carbonate

  • Carbonate of potash
  • Dipotassium carbonate
  • Potash
  • Pearl ash
Formula
K2CO3
Structure
Description
White granules or granular, translucent powder, small glassy colorless crystals, colorless monoclinic crystals. Hygroscopic.
Uses
pH Adjustment, Fungicide, Microbiocide, Herbicide

Registry Numbers and Inventories.
CAS
584-08-7
EC (EINECS/ELINCS)
209-529-3
EC Class
irritant
R 22 36/37/38
S 26 36/37/39
RTECS
TS7750000
RTECS class
Mutagen
Merck
12,7781
Beilstein/Gmelin
10012 (G)
EPA OPP
73504
Swiss Giftliste 1
G-1739
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
CK2O3
Formula mass
138.21
Melting point, °C
891
Vapor density (air=1)
AS HOH
Evaporization number
Does not evaporate.
Density
2.42 g/cm3
Solubility in water
521 g/L (25 C)
Thermal expansion
0.00024/K
Heat of fusion
35.74 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
E.
Handling
Wash thoroughly after handling. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Use with adequate ventilation.
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
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
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.
Stability
Stable under normal shipping and handling conditions.
Incompatibilities
Reacts dangerously with aluminum, fluorine, magnesium, silicon, and chlorine trifluoride.
Decomposition
Carbon monoxide, 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. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: For small fires, use water spray, dry chemical, carbon dioxide or chemical foam.
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
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
No data were available to assess the potential effects of exposure to this agent during pregnancy or lactation.
   Ingestion
May cause severe gastrointestinal tract irritation with nausea, vomiting and possible burns. May be harmful if swallowed.
   Inhalation
Causes respiratory tract irritation.
   Skin
Causes an irritant and caustic action similar to that of potassium hydroxide.
   Eyes
Causes eye irritation. 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 immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.
   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
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
HS Code
2836 40 00
 
Std. Transport #
4935230