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LC1239 Calcium hydroxide

for the preparation of DIN 19266 pH standard buffer solutions


Order number Packaging Quantity Price €
AC28239 Glass bottle 25 g 48.60


Product information
Hill Formula H2CaO2
Chemical formula Ca(OH)2
HS Code 2825 90 19
EC number 215-137-3
Molar mass 74.09 g/mol
CAS number 1305-62-0


Chemical and physical data
Solubility 1.7 g/l (20 °C)
Melting point 550 °C (decomposition)
Molar mass 74.09 g/mol
Density 2.24 g/cm3 (20 °C)
Bulk density 400 kg/m3
pH value 12.6 (H2O, 20 °C) (saturated solution)
Boiling point 2850 °C (decomposition)
Vapor pressure (20 °C)


Safety information according to GHS
Hazard Statement(s) H318: Causes serious eye damage.
Precautionary Statement(s) P280: Wear protective gloves/eye protection/face protection.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P313: Get medical advice/attention.
Signal Word Danger
Hazard Pictogram(s)
RTECS EW2800000
Storage class 10 – 13 Other liquids and solids
WGK WGK 1 slightly water endangering
Disposal 14
Inorganic salts: Container I. Neutral solutions of the these salts: Container D. Before placing in Container D, check the pH with pH-Universal indicator strips (Item No. 109535).


Safety information
R Phrase R 41
Risk of serious damage to eyes.
S Phrase S 22-24-26-39
Do not breathe dust.Avoid contact with skin.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear eye/face protection.
Categories of danger irritant
Hazard Symbol Irritant


Toxicological data
LD 50 oral LD50 rat 7340 mg/kg


pH-value (25°C) 12.43 – 12.47