Safety data for sodium hydroxide
General
Synonyms: caustic soda, soda lye, white caustic
Molecular formula:
NaOH
CAS No: 1310-73-2
EC No: 215-185-5
Physical data
Appearance: odourless white solid (often sold as pellets)
Melting
point: 318 C
Boiling point: 1390 C
Vapour density:
Vapour pressure:
1 mm Hg at 739 C
Specific gravity: 2.12 g/ml
Flash point: n/a
Explosion limits: n/a
Autoignition temperature:
Stability
Stable. Incompatible with a wide variety of materials including many
metals, ammonium compounds, cyanides, acids, nitro compounds, phenols,
combustible organics. Hygroscopic. Heat of solution is very high and may lead to
a dangerously hot solution if small amounts of water are used.
Toxicology
Very corrosive. Causes severe burns. May cause serious permanent eye
damage. Very harmful by ingestion. Harmful by skin contact or by inhalation
of dust. Typical TLV 2 mg m-1.
Toxicity data
(The meaning of any
abbreviations which appear in this section is given here.)
IPR-MUS LD50 40 mg kg-1
Irritation data
(The meaning of any
abbreviations which appear in this section is given here.)
EYE-MKY 1%/24h sev
SKN-RBT 500 mg/24h sev
Risk phrases
(The meaning of any risk
phrases which appear in this section is given here.)
R35.
Transport information
UN Major hazard class 8.0. Packing group II. UN No 1823. EMS No 8.0-06.
Personal protection
Safety glasses, adequate ventilation, Neoprene or PVC gloves.
Safety phrases
(The meaning of any
safety phrases which appear in this section is given here.)
S26 S37 S39
S45.
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This information was last updated on April 6, 2001. We have tried to make it
as accurate and useful as possible, but can take no responsibility for its use,
misuse, or accuracy. We have not verified this information, and cannot guarantee
that it is up-to-date.