Substance

CAS No.

EC No.

The maximum limit

ppm

Common uses

Trichloroethylene

79-01-6

201-167-4

1000

Cleaning and degreasing of metal parts, solvent adhesives, synthetic organic chlorine and fluorine compounds Intermediate

Boric acid

10043-35-3 

11113-50-1    

233-139-2 

234-343-4

1000

A large number of biological pesticides and preservatives in personal care products, food additives, glass, ceramics, rubber. Fertilizers, fire retardants, paints, industrial oil, brake fluid, welding products, film developer, etc.

Anhydrous sodium tetraborate

1330-43-4

12179-04-3  1303-96-4

215-540-4

1000

Large number of applications in the glass and fiberglass, ceramics, detergents and personal care products, industrial oil, metallurgy, adhesives, flame retardants, biocides, fertilizers and other industries

Heptahydrate, sodium tetraborate

12267-73-1

235-541-3

1000

  Sodium chromate

7775-11-3

231-889-5

1000

Laboratory production of other chromate compounds

Potassium chromate

7789-00-6

232-140-5

1000

Metal surface treatment and coating for the production of chemical reagents, textiles, ceramics stains, leather tanning and accessories, pigments and ink, fireworks, fireworks

Ammonium dichromate

7789-09-5

232-143-1

1000

Oxidants, leather tanning, textiles, metal surface treatment, (cathode ray tube) screen photosensitive

Potassium dichromate

7778-50-9

231-906-6

1000

Chromium metal fabrication, cleaning and degreasing metal parts, glass cleaners, leather tanning, textiles, photolithography, wood preservative treatment, cooling system corrosion inhibitor