Sustainability / Environmental ReportEmission Management of Chemical Substances
Basic Approach
In accordance with the Daicel Group Basic Policies for Responsible Care, the Daicel Group monitors the emissions and transfers of chemical substances, including those regulated under the Pollutant Release and Transfer Register (PRTR), and volatile organic compounds (VOCs), while promoting reductions in emissions and practicing appropriate management of chemical substances.
Promotion System
Reducing PRTR Substance Emissions
With regard to the chemical substances specified by Japan’s Act on Confirmation, etc. of Release Amounts of Specific Chemical Substances in the Environment and Promotion of Improvements to the Management (“PRTR Act”), as a medium-term target to be achieved by the end of FY2026/3, the Daicel Group has set a reduction target of 80% or more from levels in FY2002/3 (from 189 to 38 tonnes or less) for all Daicel’s business sites and domestic Group companies.
Total emissions from Daicel’s business sites and domestic Group companies for FY2024/3 increased from 57 tonnes in FY2023/3 to 86 tonnes. Also, the number of substances subject to notification under the PRTR Law is revised from 462 to 515 based on the legal amendments. The number of substances subject to notification handled by Daicel rose from 70 substances in FY2023/3 to 91, with the applicable new substances adding 38 tonnes.
We intend to reinforce the monitoring of our emissions of PRTR-regulated substances and further reduce emissions through process and equipment modifications.
Medium-term Target and Results (Daicel’s Business Sites and Domestic Group Companies)
- Target for FY2026/3
- Reduce emissions of PRTR-regulated substances by 80% from FY2002/3 levels (emissions of 38 tonnes or less)
- FY2024/3 result
- Achieved 54% reduction of PRTR-regulated substance emissions from FY2002/3 levels (86 tonnes in emissions)
Emission of PRTR Substances (Daicel’s business sites and domestic Group companies)
FY2024/3 Emission and Transfer of Major PRTR Substances (Daicel’s Business Sites and Domestic Group Companies)
Scroll left or right
(t/year)*１
| Ordinance-designated number | Substance | Total emissions | Emissions | Sewage | Off-site | |||
|---|---|---|---|---|---|---|---|---|
| Emissions into atmosphere | Emissions into water | Emissions into land | Business site landfill disposal | |||||
| 1-001 | Zinc compounds (water-soluble) |
2.2 | 0.0 | 2.2 | 0.0 | 0.0 | 0.0 | 0.0 |
| 1-011 | Acrylonitrile | 0.2 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 1-012 | Acrolein | 3.5 | 0.0 | 3.5 | 0.0 | 0.0 | 0.0 | 0.0 |
| 1-017 | Acetaldehyde | 2.0 | 0.6 | 1.4 | 0.0 | 0.0 | 0.0 | 0.0 |
| 1-028 | Allyl alcohol | 1.4 | 0.0 | 1.4 | 0.0 | 0.0 | 0.0 | 0.0 |
| 1-075 | Ethylene oxide | 3.6 | 0.0 | 3.5 | 0.0 | 0.0 | 0.0 | 0.0 |
| 1-098 | Peracetic acid | 7.4 | 0.0 | 7.3 | 0.0 | 0.0 | 0.0 | 0.0 |
| 1-187 | Dichlorodifluoromethane | 2.7 | 2.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 1-213 | Dichloromethane | 0.3 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 2.5 |
| 1-275 | Styrene | 3.2 | 3.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 1-278 | Dioxins*2 | 1.2 | 0.0 | 1.2 | 0.0 | 0.0 | 0.0 | 1.1 |
| 1-302 | Tetrahydrofuran | 28.8 | 28.8 | 0.0 | 0.0 | 0.0 | 6.1 | 25.0 |
| 1-321 | Triethylamine | 2.6 | 2.5 | 0.2 | 0.0 | 0.0 | 0.0 | 1.3 |
| 1-347 | Toluene | 20.4 | 20.4 | 0.0 | 0.0 | 0.0 | 0.9 | 38.9 |
| 1-354 | Nickel | 0.1 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | 5.9 |
| 1-380 | (1-Hydroxyethane-1,1-diyl) diphosphonic acid and its potassium and sodium salts |
1.3 | 0.0 | 1.3 | 0.0 | 0.0 | 0.0 | 0.0 |
| 1-415 | 2-Butenal | 0.5 | 0.0 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 |
| 1-436 | Hexane | 0.6 | 0.2 | 0.5 | 0.0 | 0.0 | 0.0 | 0.1 |
| 1-458 | Boron compounds | 1.4 | 0.0 | 1.4 | 0.0 | 0.0 | 0.0 | 0.0 |
| 1-464 | Formaldehyde | 2.5 | 2.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Others*3 | 0.6 | 0.4 | 0.1 | 0.0 | 0.0 | 0.0 | 23.3 | |
| Total | 86.5 | 61.9 | 24.6 | 0.0 | 0.0 | 7.0 | 98.1 | |
- *1The threshold for amounts handled at each workplace was 1 tonne/year.
- *2Unit for emissions and transfer of Dioxins is mg-TEQ/year.
- *3Substances with emissions below 0.1 tonnes per year are consolidated under Others.
Reducing Volatile Organic Compound (VOC) Emissions
The Daicel Group explores alternatives to chemical substances that pose a hazard to humans and the ecosystem, and strives to reduce the use of such substances.
As a medium-term target to be achieved by FY2026/3, we have set a volatile organic compound (VOC) emissions reduction target of 60% or more from levels in FY2001/3 (2,145 tonnes) at Daicel’s business sites and domestic Group companies.
FY2024/3 VOC emissions decreased by 5% year-on-year to 1,110 tonnes.
We seek to ensure safety in all our business activities, including production, consumption, and disposal, by conducting thorough risk assessments of chemical substance safety under our Total Environmental, Health and Safety Assessment System.
There were no serious leakages of VOCs in FY2024/3.
Medium-term Target and Results (Daicel’s Business Sites and Domestic Group Companies)
- Target for FY2026/3
- Reduce VOC emissions by 60% from FY2001/3 levels (emissions of 858 tonnes or less)
- FY2024/3 result
- Achieved 48% VOC emissions reduction from FY2001/3 levels (1,110 tonnes in emissions)
VOC Emissions (Daicel’s Business Sites and Domestic Group Companies)
ESG DataRefer to page 2 "Environmental Management and Prevention of Air Pollution."
Appropriate Control of PCBs
In compliance with the Waste Management and Public Cleansing Act and the Act on Special Measures Concerning Promotion of Proper Treatment of PCB Wastes, the Daicel Group in Japan conforms to appropriate processes for the storage and management of transformers, capacitors, stabilizers of lighting equipment, and other machinery waste containing polychlorinated biphenyls (PCBs).
In FY2022/3, we completed the processing of highly-concentrated PCB contaminants stored at Daicel Group sites in Japan. We are also processing low-concentration PCB contaminants as we planned for completion in FY2026/3.