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LC5017 Silicon tetraisocyanate
for synthesis


Order number Packaging Quantity Price €
AC32017 Glass bottle 5 g 76.95
AC32017 Glass bottle 10 g 122.4


Product information
Hill Formula C4N4O4Si
Chemical formula Si(NCO)4
HS Code 2842 90 80
EC number 222-297-8
Molar mass 196.15 g/mol
Storage Store below +15°C.
CAS number 3410-77-3


Chemical and physical data
Solubility (20 °C) (decomposition)
Melting point 25 – 28 °C
Molar mass 196.15 g/mol
Density 1.43 g/cm3 (20 °C)
Boiling point 186 °C (1013 hPa)
Flash point 50 °C


Safety information
R Phrase R 14-26-36/37/38-42
Reacts violently with water.Very toxic by inhalation.Irritating to eyes, respiratory system and skin.May cause sensitization by inhalation.
S Phrase S 23-26-28-37-45
Do not breathe vapour.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.After contact with skin, wash immediately with plenty of water.Wear suitable gloves.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
Categories of danger very toxic, irritant, sensitizing
Hazard Symbol Very toxic
Storage class Combustible substances, toxic
WGK WGK 3 highly water endangering
Disposal 11
Organic acid halides, anhydrides and isocyanates can be added dropwise to an excess of methanol (Cat. No. 822283) to convert them into the corresponding methyl esters or methyl carbamates. If necessary, neutralize with sodium hydroxide solution (Cat. No. 105587). Fill into container A.


Transport information
Declaration (transport by sea) IMDG-Code UN 2811 TOXIC SOLID, ORGANIC, N.O.S.(SILICIUMTETRAISOCYANATE), 6.1, II
Declaration (transport by air) IATA-DGR UN 2811 TOXIC SOLID, ORGANIC, N.O.S.(SILICIUMTETRAISOCYANATE), 6.1, II


Assay (ex Si) ≥ 98 %
Melting range
– lower value
≥ 25 °C
– upper value ≤ 28 °C
Identity (IR) passes test