Allowance of gallium, indium and antimony

The industrial development and application history of gallium , indium , antimony and antimony is short and the dosage is not large. Although some poisoning incidents have been discovered, their toxicity to environmental ecology and humans, as well as effective targeted control measures, still need further Research and identification.
The tolerances in the environment that have been proposed for 8h working days abroad are shown in the table, and China operates according to the “recommended standards”.
Workplace air tolerance (mg/m 3 )
Ga
In
Tl
Ge
TlBr
TlI
GeO 2
GeCl 4
GeH 4
American standard
-
0.1-0.3
0.1
0.6-1.8
-
-
-
-
0.6
Former Soviet standard
2
0.01
2-5
0.01
0.01
2
1
-
Recommended standard
2
0.01
0.001
0.04
0.01
0.01
-
-
-
Domestic and foreign tolerances for gallium, indium, antimony, and antimony in drinking water and wastewater are not allowed to be reported except for the US containing Tl <10 mg/m 3 for wastewater.
The direction and distribution of the exploitation of thallium in thallium should track large reserves of Yunfu pyrite and Lanping lead zinc ore, prevention and proper utilization.

Ethylen Amine Series

Ethylene amines refers to the acyclic ethylenediamine polymer products, as an important fine chemical intermediates, ethylene amines in organic synthesis, medicine, dye, pesticide, chemical fertilizer, rubber plastic additives, organic solvents and epoxy resin curing agent, and other fields has been widely used. which become to be one of the fine petrochemical intermediates for the development of China. Ethylenediamine (EDA) is a very important intermediate, mainly used to produce EDTA(chelating agent) and TAEDA(bleach activator), can also be used to produce Organic Dye, Dye-fixing Agent, coating, pesticide, etc. Piperazine can be used to produce anhydrous piperazine, n-methyl piperazine, n-ethyl piperazine, pharmaceutical intermediates, fluperacid, halogen free flame retardant, triethylene diamine. Piperazine has been exported to India and Japan.

Ethylen Amine Series,Intermediates Diethylenetriamine Deta,Acyclic Ethylenediamine Polymer,Intermediate Piperazine Hydrate

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