What are the requirements and requirements for the use of occupational disease protection products
In addition to GB / T 11651-2008 "individual protective equipment selection specification", should also carry out occupational hazards risk analysis:
A1 toxicity hazards
A1.1 Overview refers to the ability of chemicals to penetrate the body through inhalation, ingestion, skin and eye contact. Mainly consider the inherent hazards of the substance itself and the harm of the decomposition products in the case of fire, taking into account the chronic effects, such as carcinogenic, teratogenic and mutagenic, but do not consider the risk of fire burns.
A1.2 Hazard classification is based on the inherent characteristics of the poison and the possible harm, will be divided into highly toxic, highly toxic, moderate toxicity, low toxicity and micro-toxic five, respectively, with 4,3,2,1,0 said The The division principle is as follows:
A) 4 means that poison is a chemical that may cause death or serious injury after short-term exposure. The division principle is as follows:
LD50 ≤ 5mg / kg (oral) chemicals
LD50 ≤ 40mg / kg (transdermal) chemicals
LC50≤0.5mg / L (dust or smoke)
LC50≤ (1 × 1000M / 24.45) mg / m3 (gas)
At 20 ° C under normal temperature, the saturated vapor concentration is 10 times that of LC50 and LC 50 ≤ (1 × 1000 · M / 24.45) mg / m3.
B) 3 means that high toxicity refers to chemicals that can cause serious temporary or permanent injury after short-term exposure. The division principle is as follows:
5mg / kg <LD50 ≤ 50mg / kg (oral) chemicals
40mg / kg <LD50 ≤ 200mg / kg (transdermal) chemicals
0.5mg / L <LC50≤2mg / L (dust or smoke)
(1 × 1000 · M / 24.45) mg / m3 <LC50 ≤ (3 × 1000 · M / 24.45) mg / m3 (gas)
(1 × 1000 · M / 24.45) mg / m3 <LC50 ≤ 3 × (1000 · M / 24.45) mg / m3 at 20 ℃ under normal temperature;
