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ANNEX TO CLASS 4.2
CLASS 4.2 - Spontaneously combustible



THIOUREA DIOXIDE

FORMAMIDINE SULPHINIC
ACID
UN No.                    Formula
3341                     CH4N2O2S
Properties
White to yellow-white crystalline powder.
Virtually odourless.
Strong reducing agent. Violent exothermic decomposition above
lOO℃ with emission of large amounts of sulphur oxides, ammonia,
carbon monoxide, carbon dioxide, nitrogen oxides and hydrogen
sulphide.
Extended exposure to temperatures above 50℃ and moisture may
cause visible decomposition.

Observations
Dust irritating to skin, eyes and mucous membranes.

Packing groupt ? or ?
according to the grouping
criteria
Packing                      Receptacle    Package
                           net       gross
                                    kg
Hermetically sealed:
Drum, fibre (1 G)                 -       250
BAGS (5H3), (5H4), (5L3), (5M2)       -       55

For IBCs See section 26 of the General Introduction.


Stowage
Category D.

Label of class
   4.2

Packing, Stowage & Segregation
See also General Introduction and introduction to this class.

IMDG CODE - PAGE 4264 (page 4264-1 follows)
Amdt. 29-98


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