タイトルまたは説明

Silica Gel sand for refining decolorising


Chemical Name: Quartz : %SiO2 *2 particles *0 microns or smaller)
The exposure limits are time-weighted average concentrations for an eight-hour workday and a **-hour
work week.
Crystalline silica exists in several forms, the most common of which is quartz. If crystalline silica (quartz)
is heated to more than **0ï‚°C, it can change to a form of crystalline silica known as tydimite, and if
crystalline silica (quartz) is heated to more than ***0ï‚°C, it can change to a form of crystalline known as
cristobalite. The OSHA PEL for crystalline silica as trydimite and cristobalite is one-half of the OSHA PEL
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