8.21841 EMD Millipore

Methyl thiocyanate

Methyl thiocyanate for synthesis. CAS 556-64-9, EC Number 209-134-6, chemical formula CH₃SCN., for synthesis

Synonym: Thiocyanic acid methyl ester

  • CAS Number 556-64-9

  • Linear Formula C₂H₃NS

  • Molecular Weight 73.12 g/mol

  •  EC Number 209-134-6



Related Categories Biochemicals and Reagents More...
packaging   50 ml in Glass bottle (8218410050)
vapor pressure   16.1 hPa (25 °C)
density   1.07 g/cm3 (20 °C)
flash point   38 °C
mp   -5 °C
LD 50 oral   LD50 Rat 60 mg/kg
shipped in   ambient
storage temp.   Store at <= 20°C.
specifications   Assay (GC, area%): ≥ 96.0 % (a/a)
  Density (d 20 °C/ 4 °C): 1.072 - 1.074
  Identity (IR): passes test

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Safety Information

HS Code 
2930 90 98
Hazard Statement(s) 
H226: Flammable liquid and vapour.
H301: Toxic if swallowed.
H315: Causes skin irritation.
H319: Causes serious eye irritation.
Precautionary Statement(s) 
P210: Keep away from heat/sparks/open flames/hot surfaces. No smoking.
P260: Do not breathe vapour.
P302 + P352: IF ON SKIN: Wash with plenty of soap and water.
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.
Storage class 
3 Flammable liquids
WGK 3 highly water endangering
Carcinogenic compounds and flammable compounds labelled "Highly toxic" or "Toxic": container F. Alkyl sulfates are carcinogenic; Take particular care to avoid inhalation and skin contact. To neutralize alkyl sulfates, add dropwise (from a dropping funnel) to concentrated ice-cool Ammonia solution (Cat.No. 105426) with vigorous stirring. Before placing in container D, check the pH with pH Universal indicator strips (Cat.No. 109535).
Hazard Pictogram(s) 
GHS02  GHS02
Hazard Pictogram(s) 
GHS06  GHS06
Hazard Symbols 
Toxic  Toxic
Declaration (railroad and road) ADR, RID 
UN 3080 , 6.1 (3), II
Declaration (transport by air) IATA-DGR 
UN 3080 , 6.1 (3), II
Declaration (transport by sea) IMDG-Code 
UN 3080 , 6.1 (3), II
Categories of danger 
flammable, toxic, irritant
R Phrase 
R 10-25-36/38
Flammable.Toxic if swallowed.Irritating to eyes and skin.
S Phrase 
S 23-26-37-45
Do not breathe vapour.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.Wear suitable gloves.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
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