What is the fire hazard classification for hydrogen peroxide with a concentration of 8% or less, and what are the criteria used for this classification?

Hydrogen peroxide at concentrations of 8% or less is generally not classified as a flammable liquid, and therefore has a low fire hazard. According to safety standards such as the International Fire Code (IFC), hydrogen peroxide is classified primarily based on its concentration and its ability to promote combustion. Hydrogen peroxide at concentrations of 8% or lower is considered non-flammable and non-explosive, and therefore is not typically classified as high-risk in fire hazard classifications. .

This post was last edited by hhwjt on 2024-8-8 at 10:16. According to Clause 3.1.3 of the explanatory notes in the \"Code for Fire Protection Design of Buildings\" (GB50016-2014), Article 2 of Item (1) outlines the principles for classifying the fire hazard of stored items; the classification of Class B stored items is primarily based on oxidizers of Grade II as defined in China’s \"Rules for the Transport of Dangerous Goods\". Article 6.1 of the \"Notice from the General Office of the State Administration for Work Safety on Issuing the Implementation Guidelines (Trial) for the Catalogue of Hazardous Chemicals (2015 Edition)\” (An Jian Zong Tang Guan San [2015] No. 80) specifies the classification of hydrogen peroxide as follows: 1) Concentration ≥60%: Oxidizing liquid, Category 1; Skin corrosion/irritation, Category 1A; Severe eye damage/eye irritation, Category 1; Specific target organ toxicity – single exposure, Category 3 (respiratory irritation) ； 　　2) 20% ≤ content < 60%: Oxidizing liquid, Category 2; skin corrosion/irritation, Category 1A; severe eye damage/eye irritation, Category 1; specific target organ toxicity – single exposure, Category 3 (respiratory irritation) ； 　　3) 8% ≤ content < 20%: Oxidizing liquids, Category 3; Skin corrosion/irritation, Category 1A; Serious eye damage/eye irritation, Category 1; Specific target organ toxicity – single exposure, Category 3 (respiratory tract irritation) ； Classification of hydrogen peroxide in the “List of Explosives-Prone Hazardous Chemicals” (2017 edition): (1) Concentration ≥60%, oxidizing liquid, Category 1 ； (2) 20% ≤ content < 60%, oxidizing liquid, Category 2 ； (3) 8% ； The fire hazard level of the hydrogen peroxide production plant is Class A ； The fire hazard level for storage facilities containing aqueous hydrogen peroxide solutions (with a hydrogen peroxide content of over 60%) is Class A ； The fire hazard classification for storage facilities containing aqueous hydrogen peroxide solutions (with a hydrogen peroxide content of not less than 20% but not more than 60%) is Class B ； The fire hazard classification for storage facilities containing aqueous hydrogen peroxide solutions (with a hydrogen peroxide content of 8% or more, but less than 20%) is Class C ； Aqueous hydrogen peroxide solutions (with a hydrogen peroxide content of less than 8%) are not considered hazardous chemicals, and the fire hazard classification for storage facilities is Class V. It can’t be classified as Category A; Category B is fine. As for Category E, experts are likely to have different opinions.

Do Category 1, Category 2, and Category 3 mean Class A, Class B, and Class C?

This post was last edited by Clouds of flowing water shine on 2024-8-12 at 13:23. The classification of oxidizing liquids is somewhat abstract. For details, refer to Table 1 in \"GB 30000.14-2013 Specifications for the Classification and Labelling of Chemicals – Part 14: Oxidizing Liquids\". Category 1: Any substance or mixture that can catch fire when tested as a mixture with cellulose in a mass ratio of 1:1; or any substance or mixture whose average pressure rise time for a mixture of the test substance and cellulose in a mass ratio of 1:1 is less than 50% of the average pressure rise time for a mixture of perchloric acid and cellulose in a mass ratio of 1:1. Category 2: Substances (or mixtures) for which, when tested as mixtures at a mass ratio of 1:1 with cellulose, the average pressure rise time is less than or equal to that of a mixture of an aqueous solution of sodium chlorate at 40% concentration and cellulose at a mass ratio of 1:1; and any substance or mixture that does not meet the criteria for Category 1. Category 3: Any substance or mixture for which, when tested as a mixture with cellulose in a mass ratio of 1:1, the average pressure rise time is less than or equal to that of a mixture of 65% aqueous nitric acid with cellulose in a mass ratio of 1:1; and which does not meet the criteria for Category 1 or Category 2. As users, it is difficult for us to make judgments based on GB 30000.14. Generally, we refer to the conclusions in the “Catalog of Hazardous Chemicals (2015 edition) [Amended in 2022]”. However, for some substances such as sulfur trioxide, its oxidizing property is not specified, and in such cases it is necessary to consult relevant experts. ”

Hello, teacher. What is the basis for classifying hydrogen peroxide aqueous solutions with a concentration of 8% to 20% as Category C? According to Article 3.1.1 of GB50016, Category C includes only liquids and combustible solids with a flash point of 60°C or higher, while oxidizers that do not fall under Category A are classified in Category B.