Sodium hydroxide

Synonyms: Potash caustic

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Catalogue Number106498
SynonymsSoda caustic
Product Information
CAS number1310-73-2
EC index number011-002-00-6
EC number215-185-5
Hill FormulaHNaO
Chemical formulaNaOH
Molar Mass40.00 g/mol
HS Code2815 11 00
Physicochemical Information
Density2.13 g/cm3 (20 °C)
Melting Point319 – 322 °C
pH value>14 (100 g/l, H₂O, 20 °C)
Solubility1090 g/l
Safety Information according to GHS
Hazard Pictogram(s)Hazard Pictogram(s)Hazard Pictogram(s)
Hazard Statement(s)H290: May be corrosive to metals.
H314: Causes severe skin burns and eye damage.
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.
P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician.
Signal WordDanger
Storage class8B Non-combustible, corrosive hazardous materials
WGKWGK 1 slightly hazardous to water
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
Hazard SymbolsHazard SymbolsHazard SymbolsCorrosive
Categories of dangercorrosive
R PhraseR 35
Causes severe burns.
S PhraseS 26-37/39-45
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear suitable gloves and eye/face protection.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
Storage Information
StorageStore at +5°C to +30°C.

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