Chemical Substances Control

Our Concepts

The SII Group believes that the safe and appropriate chemical substances control is corporate responsibility and important activity for risk management. In terms of chemical substances used in our manufacturing processes at sites in Japan, we control the use and emission of PRTR* substances, 23 substances voluntarily specified by SII, and 100 VOC (volatile organic compounds) substances.

*PRTR (Pollutant Release and Transfer Register): This system is designed to assess, gather, and disclose data on the volume of chemical materials handled, amounts released into the environment, and volumes transferred in waste materials to points outside the site locations. Companies collect data on the relevant substances and report them to the appropriate government agency once a year.

Reduction of Chemical Substances Subject to Control FY 2018 Overview

The FY 2018 total emission of chemical substances subject to control in manufacturing process was 26.5 tons, which was approximately 8 tons less than the total for FY 2017. This was largely because the emission amount did not include the semiconductor business that was spun off from the SII Group in January 2018.
The amount of PRTR substances handled was 66.2 tons, which was 40 tons less than the amount for FY 2017. The breakdown of the amount handled and emitted is shown below.

Breakdown of PRTR Substances (Amount handled and emitted)

FY 2018 PRTR Survey Results (SII sites in Japan only)

PRTR
(Unit: kg)
Chemical Substance Amount Handled Released Transferred Recycled Consumed Removed and Treated
1.
Released to the atmosphere
2.
Releases to public water systems
3.
Released to soil
4.
On-site landfill
5.
Transferred to sewage systems
6.
Transferred as waste
7.
Transferred as valuable waste
8.
Transferred as products
9.
Break-down and reaction
Ethylbenzene 743 198 0 0 0 0 0 545 0 0
Ferric chloride 16,112 0 0 0 0 0 0 0 0 16,112
Xylene 1,221 285 0 0 0 0 56 878 0 2
Cobalt and its compound 17,997 0 0 0 0 0 6 522 17,469 0
Inorganic cyano compounds (excluding complex salts and cyanates) 631 12 0 0 0 0 0 0 0 619
1,3,5-trimethylbenzene 791 24 0 0 0 0 0 752 0 15
Toluene 1,902 1,245 0 0 0 0 657 0 0 0
Lead compounds 2,588 0 0 0 0 0 1,684 0 904 0
Nickel compounds 1,054 0 2 0 0 0 575 31 446 0
Phenol 1,655 248 0 0 0 0 1,324 0 0 83
Hydrogen fluoride and its water-soluble salts 14,953 12 0 0 0 0 14,194 0 0 747
Boron and its compounds 126 0 118 0 0 0 6 0 0 2
Manganese and its compounds 6,460 0 0 0 0 0 1,427 0 5,033 0
Total 66,233 2,024 120 0 0 0 19,929 2,728 23,852 17,580

Measures against Ozone Depleting Substances

SII has completed the total elimination of specified chlorofluorocarbons (CFCs), which are ozone depleting substances, used in our manufacturing processes, however we still use CFCs as refrigerant for chillers and air-conditioners. Our sites in Japan are in accordance with the CFC emissions law and have been striving to prevent leaks during use in addition to disposal through conducting simple checks and periodic inspections since FY 2015.

[Case Study in FY 2015] Initiatives for protection of ozone layer

New Chiller
New Chiller

SII has totally abolished the use of ozone-depleting chlorofluorocarbons (CFCs) in manufacturing processes. However, they still remain as refrigerants in chillers and air conditioners. In accordance with the Revision of the Fluorocarbons Control Law concerning emission reductions implemented in 2015, Japan sites are working on simple inspections and periodic inspections to prevent leakage when using CFCs.
Conforming to the "Environmental Protection and Management Act", Seiko Instruments Singapore Pte. Ltd., the manufacturing site located in Singapore, has been working toward the systematic replacement of four chillers using the ozone depleting substance CFC-12. The use of CFC-12 as a refrigerant in the facilities was completely eliminated when the changeover of the last old chiller with CFC-12 as a refrigerant was achieved in FY 2015. The new chiller model provides higher energy efficiency than the old models. The new chillers enable an energy consumption reduction of 13% per chiller as compared with the conventional chillers.