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Physical & Chemical properties

Flammability

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Description of key information

Not applicable to solid Sodium isobutyl xanthate which in the presence of moisture and/or heat decomposes to carbon disulphide, alcohol, sodium carbonate and trithiocarbonate.
Carbon disulphide (CAS number 75–15–0) is the major decomposition product and has a low autoignition point and is highly flammable.
Expert Judgement
Due to the decomposition of Sodium isobutyl xanthate when is heated this substance is not considered to exhibit flammability but the major decomposition product Carbon disulphide (CAS number 75–15–0) have to be considered.
Therefore testing for flammability does not need to be performed.

Key value for chemical safety assessment

Flammability:
highly flammable

Additional information

Sodium isobutyl xanthate in the presence of moisture and/or heat decomposes. Carbon disulphide (CAS number 75–15–0) is the major decomposition product This classification is made because Sodium isobutyl xanthate on contact with moisture/water are prone to self-combustion asa result of exothermic decomposition to CS2 which is highly flammable.

Justification for classification or non-classification

This classificationismade because Sodium isobutyl xanthate on contact with moisture/water are prone to self-combustion asa result of exothermic decomposition to CS2 which is highly flammable.

Based on the hazard assessment of Sodium isobutyl xanthate in section 2.1 and 2.2 in IUCLID 5.4, available data for the substance and according to the criteria described in Directive 67/548/EEC and in the Regulation (EC) No 1272/2008 on classification, labelling and packaging of substances and mixtures (CLP Regulation):

 

Directive 67/548

E;R2 Risk of explosion by shock, friction, fire or other sources of ignition

E;R3 Extreme risk of explosion by shock, friction, fire or other source of ignition

O; R7 May cause fire

O; R8 Contact with combustible material may cause fire

O; R9 Explosive when mixed with combustible material

F+; R12 Extremely flammable

F; R11 Highly flammable

F; R15 Contact with water liberates extremely flammable gas

F; R17 Spontaneously flammable in air

R10 Flammable

CLP Regulation

H242 Org. Perox. CD Heating may cause a fire

H242 Org. Perox. EF Heating may cause a fire

Gas: H270 Ox. Gas 1: May cause or intensify fire; oxidiser

Liquid: H271 Ox. Liq 1 May cause fire or explosion; strong oxidiser

Solid: H271 Ox. Sol 1 May cause fire or explosion; strong oxidiser

H272: May intensify fire; oxidiser

Gas: H220 Flam. Gas 1: extremely flammable gas

Gas: H221 Flam. Gas 2: flammable gas

Aerosol: H222 Category 1: extremely flammable aerosol

Aerosol:H223 category 2: flammable aerosol

Liquid: H224 Flam. Liq. 1

H242 Self-react. CD: Heating may cause a fire

H242 Self-react. EF: Heating may cause a fire

None Self-react. G

Liquid: H224 Flam. Liq. 1, if initial boiling point <35ºC

Liquid: H225 Flam. Liq. 2, if initial boiling point >35ºC

Solid: H228: Flammable solid

Solid: H250, Pyr. Liq. 1: Catches fire spontaneously if exposed to air

Liquid: H250, Pyr. Sol. 1: Catches fire spontaneously if exposed to air

Liquid: H224 Flam. Liq. 1, if flashpoint<23ºC and initial boiling point<35ºC

Liquid: H225 Flam. Liq. 2, if flashpoint<23ºC and initial boiling point>35ºC

Liquid: H226 Flam. Liq. 3, if flashpoint>23ºC

H200: unstable explosive

H201: explosive; mass explosion hazard

H202: explosive; severe projection hazard

H203: explosive; fire, blast or projection hazard

H204: Fire or projection hazard

H205: may mass explode in fire

H280: contains gas under pressure; may explode if heated

H281: contains refrigerated gas; may cause cryogenic burns or injury

H240: heating may cause an explosion

H241: Heating may cause a fire or explosion

H251: Self-heating; may catch fire

H252: Self-heating in large quantities; may catch fire

H260: In contact with water releases flammable gases which may ignitespontaneously

H261: In contact with water releases flammable gases

H290: May be corrosive to metals

 

 

It is concluded that Sodium isobutyl xanthate  meet the criteria to be classified for flammability.

 

 

R11 Highly flammable

H228: Flammable solid