send us an inquiry
LC4908 Potassium tert-butylate
for synthesis


Order number Packaging Quantity Price €
AC31908 Glass bottle 100 g 18.23
AC31908 Glass bottle 250 g 39.15


Product information
Hill Formula C4H9KO
Chemical formula (CH3)3COK
HS Code 2905 19 00
EC number 212-740-3
Molar mass 112.21 g/mol
CAS number 865-47-4


Chemical and physical data
Ignition temperature 360 °C
Solubility (20 °C) (decomposition),Hydrolysis
Melting point 256 – 258 °C
Molar mass 112.21 g/mol
Bulk density 500 kg/m3
pH value ca.13 (5 g/l, H2O, 20 °C) Hydrolysis
Boiling point 220 °C (1 hPa) (sublimed)
Vapor pressure 0.07 hPa (180 °C)
Explosion limit 2.4 – 8.0 %(V)


Safety information according to GHS
Hazard Statement(s) H260: In contact with water releases flammable gases which may ignite spontaneously.
H290: May be corrosive to metals.
H302: Harmful if swallowed.
H314: Causes severe skin burns and eye damage.
EUH014: Reacts violently with water.
Precautionary Statement(s) P280: Wear protective gloves/protective clothing/eye protection/face protection.
P301 + P330 + P331: IF SWALLOWED: rinse mouth. Do NOT induce vomiting.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P402 + P404: Store in a dry place. Store in a closed container.
Signal Word Danger
Hazard Pictogram(s)

Storage class Flammable solids
WGK WGK 1 slightly water endangering
Disposal 13
Bases and alcoholates should be diluted if necessary by carefully stirring them into water and then neutralized (protective gloves, fume cupboard!) with hydrochloric acid (Cat. No. 100312). Before placing in container D, check the pH with pH universal indicator strips (Cat. No. 109535).


Safety information
R Phrase R 11-14-22-35
Highly flammable.Reacts violently with water.Harmful if swallowed.Causes severe burns.
S Phrase S 16-26-36/37/39-43-45
Keep away from sources of ignition – No smoking.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear suitable protective clothing, gloves and eye/face protection.In case of fire, use powder extinguisher. Never use water.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
Categories of danger highly flammable, harmful, corrosive
Hazard Symbol



Transport information
Declaration (transport by sea) IMDG-Code UN 3096 CORROSIVE SOLID, WATER-REACTIVE, N.O.S.(POTASSIUM-TERT-BUTYLATE), 8 (4.3), I, Segregation Group: 18 (Alkalis)
Declaration (transport by air) IATA-DGR UN 3096 CORROSIVE SOLID, WATER-REACTIVE, N.O.S.(POTASSIUM-TERT-BUTYLATE), 8 (4.3), I


Toxicological data
LD 50 oral LD50 rat 690 mg/kg


Assay (acidimetric) ≥ 98 %
Free KOH ≤ 1 %
Identity (IR) passes test