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 standardsâ€.
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.
Precision alloys usually refer to functional metals with special physical properties, such as magnetic, electrical, and thermal properties, including magnetic alloys, elastic alloys, and expanded alloys. The precision alloys produced by Seonjip are mainly used in industries such as electronic devices, instruments and so on.
Kovar Sheet,Invar 36 Bar,Invar 36 Round Bar,Nickel Steel Alloy Invar
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