Rules for classification and labelling of chemicals —12: Self-heating substances and mixtures
1 Scope
This part of GB 30000 specifies the terms and definitions, classification, judgment logic and guidance and labelling of self-heating substances and mixtures. This part is applicable to the classification and labelling of self-heating substances and mixtures according to the United Nations Globally Harmonized System of Classification and Labelling of Chemicals (hereinafter referred to as GHS).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 6944-2012 Classification and code of dangerous goods
GB 13690 General rule for classification and hazard communication of chemicals
The United Nations Harmonized System of Classification and Labelling of Chemicals (Rev.4)
The United Nations Recommendations on the Transport of Dangerous Goods: Manual of Tests and Criteria (Rev.5)
The United Nations Recommendations on the Transport of Dangerous Goods: Model Regulations (Rev.17)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB 13690 and the following apply.
3.1
self-heating substances
solid or liquid substance or mixture, other than a pyrophoric liquid or pyrophoric solid, that reacts with air without an energy supply to self-heat; this substance or mixture differs from a pyrophoric liquid or pyrophoric solid in that spontaneous combustion occurs only in large quantities (kilograms) and over a long period of time (hours or days)
Note: Self-heating of a substance or mixture is a process in which the substance or mixture reacts gradually with oxygen (in the air) to produce heat. If the rate of heat production exceeds the rate of heat loss, the temperature of the substance or mixture rises, and may lead to spontaneous ignition and combustion over time.
4 Classification standards
4.1 General principles
See GB 13690 for general principles of classification and labelling of self-heating substances and mixtures.
4.2 Classification standards
4.2.1 A substance or mixture shall be classified as a self-heating substance of this class if the following results are obtained from tests conducted in accordance with the test methods in 33.3.1.6 of Part 3 of the United Nations Recommendations on the Transport of Dangerous Goods: Manual of Tests and Criteria (Rev.5) (hereinafter referred to as the "Manual of Tests and Criteria").
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification standards
5 Judgment logic and guidance
6 Labelling
Annex A (Informative) Judgment logic and guidance
Annex B (Normative) Allocation of label elements
Annex C (Normative) Classification standard and label elements of self-heating substances and mixtures
Annex D (Informative) Hazard statements and precautionary statements for self-heating substances and mixtures
Annex E (Informative) Example of self-heating substances and mixtures label
Bibliography
