28. February 2019
One aspect of the evaluation of a chemical inventory list of a bluesign company assessment is the chemical consumption. The volume of basic chemicals in textile finishing can vary between 20% to 70% of total chemical consumption at a textile finisher and therefore represents a significant large amount of chemicals besides the dyes and auxiliaries.
On average, 20 different basic chemicals, 80 different auxiliaries and 200 different dyes are applied at a mill.
The most common basic chemicals are:
- Acids: Sulphuric acid, Phosphoric acid, Hydrochloric acid, Nitric acid (inorganic) and Acetic acid, Formic acid, Citric acid, Oxalic acid (organic)
- Caustic: Sodium hydroxide (caustic soda) and Sodium carbonate
- Salts: Sodium chloride and Sodium sulfate
- Oxidizing agents: Hydrogen peroxide
- Reducing agents: Sodium dithionite (Hydrosulfite) and Thiourea dioxide
- Others: Urea
The importance of the identification of each basic chemicals substances, including impurities, is critical due to the risk of the hazardous substances in these basic chemicals and the huge amount used in the industry.