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Name Sodium hydroxide
CAS 1310-73-2
EINECS(EC#) 231-659-4
Molecular Formula HNaO
MDL Number MFCD00011405
Molecular Weight 40
MOL File 1310-73-2.mol

Chemical Properties

Definition The most important commercial caustic.
Appearance NaOH is a white, odorless, deliquescent material sold as pellets, flakes, lumps, or sticks. Aqueous solutions are known as soda lye
Melting point  681 °C(lit.)
Boiling point  145 °C
density  1.515 g/mL at 20 °C
vapor density  <1 (vs air)
vapor pressure  1 mm Hg ( 745 °C)
refractive index  1,473-1,475
Fp  176-178°C
storage temp.  2-8°C
solubility  H2O: 1 M at 20 °C, clear, colorless
form  beads
color  White
Specific Gravity 2.13
Odor Odorless
PH >14 (100g/l, H2O, 20℃)
PH Range 13 - 14
Water Solubility  SOLUBLE
Decomposition  176-178 ºC
Sensitive  Air Sensitive & Hygroscopic
λmax λ: 260 nm Amax: 0.015
λ: 280 nm Amax: 0.01
Merck  14,8627
Exposure limits TLV-TWA air 2 mg/m3 (OSHA); ceiling 2 mg/m3 (ACGIH) and 2 mg/m3/15 min (NIOSH).
Stability: hygroscopic
Sodium Hydroxide is an alkali that is soluble in water, having a solubility of 1 g in 1 ml of water. it is used to destroy the bitter chemicals in olives that are to become black olives. it also functions to neutralize acids in various food products.
CAS DataBase Reference 1310-73-2(CAS DataBase Reference)
NIST Chemistry Reference Sodium hydroxide(1310-73-2)
EPA Substance Registry System 1310-73-2(EPA Substance)

Safety Data

Hazard Codes  C,Xi
Risk Statements 
R36/38:Irritating to eyes and skin .
R35:Causes severe burns.
R34:Causes burns.
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S37/39:Wear suitable gloves and eye/face protection .
S24/25:Avoid contact with skin and eyes .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
RIDADR  UN 1824 8/PG 2
WGK Germany  1
RTECS  TT2975000
HazardClass  8
PackingGroup  II
HS Code  2815 11 00
Safety Profile
Poison by intraperitoneal route. Moderately toxic by ingestion. Mutation data reported. A corrosive irritant to skin, eyes, and mucous membranes. When heated to decomposition it emits toxic fumes of NanO.
Hazardous Substances Data 1310-73-2(Hazardous Substances Data)
LD orally in rabbits: 500 mg/kg (10% soln) (Fazekas)
IDLA 10 mg/m3

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