Home > Environment > Business (Manufacturing) > Management of Chemicals: Managing chemical substances by ranking 


Committed to People, Committed to the Future.

Managing chemical substances by ranking

Toshiba Group classifies standards for the handling of chemical substances into the three categories of prohibition, reduction, and control, and manages chemical substances according to the regulations for each category. The relationship between substance ranking and management classifications, which shows the concept underlying this initiative, is indicated in the figure below. Approximately 2,000 types of chemical substances are classified into three ranks (hazard level A, B, and C) based on the regulatory levels set by environmental legislation, data on carcinogenic chemicals, and other factors. The classifications of prohibition, reduction, and control are determined by judging risks for each chemical substance using the ranking of the substance equivalent to hazard levels and emissions equivalent to exposure to the substance.

Substance ranking and management classifications
[Image] Substance ranking and management classifications

Analyzing chemical substances discharged Law Concerning Pollutant Release and Transfer Register (PRTR Law)

PRTR-based material balance
This expresses the balance of Toshiba Group's total material volume based on the PRTR Law in Japan.

[Image] PRTR-based material balance

  • The amount consumed refers to the amount of substances covered by PRTR that are changed into other substances by chemical reaction or transferred outside along with products whether they are contained therein or accompany them.
  • The amount of removed and treated refers to the amount of substances covered by PRTR that undergo such processes as incineration, neutralization, decomposition, or reaction treatment and are changed into other substances inside operation sites.
  • Landfills at operation sites (stable, controlled, or isolated) are equivalent to the amount emitted. The amount released to public sewerage is categorized as the amount transferred.
  • The difference between the amounts transferred and recycled is determined based on whether fees are charged for recycling of the materials. Accordingly, waste is included in the amount transferred if Toshiba Group asks contractors to dispose of it and pay for the service, even if the purpose is to recycle it.

To Top