Product Information
ApplicationCalcium hydroxide for the preparation of DIN 19266 pH standard buffer solutions. CAS 1305-62-0, chemical formula Ca(OH)₂.
Biological Information
Physicochemical Information
Density2.24 g/cm3 (20 °C)
Melting Point550 °C (decomposition)
pH value12.6 (H₂O, 20 °C) (saturated solution)
Bulk density400 kg/m3
Solubility1.7 g/l
Materials Information
Toxicological Information
LD 50 oralLD50 Rat 7340 mg/kg
Safety Information according to GHS
Hazard Pictogram(s) Hazard Pictogram(s)
Hazard Pictogram(s)
Hazard Statement(s)H315: Causes skin irritation.
H318: Causes serious eye damage.
H335: May cause respiratory irritation.
Precautionary Statement(s)P260: Do not breathe dust.
P280: Wear eye protection.
P302 + P352: IF ON SKIN: Wash with plenty of soap and water.
P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
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 WordDanger
Storage class10 - 13 Other liquids and solids
WGKWGK 1 slightly hazardous to water
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
Hazard Symbols Hazard SymbolsIrritant
Categories of dangerirritant
R PhraseR 37/38-41
Irritating to respiratory system and skin.Risk of serious damage to eyes.
S PhraseS 22-26-39
Do not breathe dust.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear eye/face protection.
Product Usage Statements
Storage and Shipping Information
StorageStorage temperature: no restrictions.
Packaging Information
Transport Information
Supplemental Information
pH-value (25°C)12.43 - 12.47


Calcium hydroxide SDS


Safety Data Sheet (SDS) 

Calcium hydroxide Certificates of Analysis

Product Number PackagingLot Number
1021110025 Glass bottle

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Reagents, Chemicals and Labware > Inorganic Reagents > Instrumental Inorganic Analysis > Certipur® Standards, Reference Materials and Buffers > Certipur® Reference Material for Reliable Calibration in pH Measurement > Certified Secondary Reference Buffer Solutions and Substances