Emission Management of Chemical Substances | Sustainability

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.

Management Structure

Promotion System for Responsible Care

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 (the “PRTR Act”), as a mid-term target to be achieved by the end of FY2031/3, the Daicel Group has set a reduction target of 62% or more from the levels in FY2002/3 (from 189 to 72 tonnes or less) for all Daicel’s business sites and domestic Group companies; refer to the Voluntary Action Plan made by Japan Chemical Industry Association (JCIA) as a reference.

Total emissions from Daicel’s business sites and domestic Group companies for FY2026/3 increased from 70 tonnes in FY2025/3 to 78 tonnes.

We intend to reinforce the monitoring of our emissions of PRTR-regulated substances and further reduce emissions through process and equipment modifications.

Mid-term Target and Results (Daicel’s Business Sites and Domestic Group Companies)

FY2031/3 Target: Reduce emissions of PRTR-regulated substances by 62% from FY2002/3 levels (emissions of 72 tonnes or less)
FY2026/3 Results: Achieved 59% reduction of PRTR-regulated substance emissions from FY2002/3 levels (78 tonnes in emissions)

Emission of PRTR Substances (Daicel’s Business Sites and Domestic Group Companies)

2021年度は当社事業場が57トン・国内グループ企業が26トン・合計83トン、2022年度は当社事業場が47トン・国内グループ企業が10トン・合計57トン、2023年度は当社事業場が80トン・国内グループ企業が6トン・合計86トン、2024年度は当社事業場が62トン・国内グループ企業が8トン・合計70トン、2025年度は当社事業場が69トン・国内グループ企業が9トン・合計78トン。

ESG Data Refer to page 2 "Substances Subject to the PRTR."

FY2026/3 Emission and Transfer of Major PRTR Substances (Daicel’s Business Sites and Domestic Group Companies)

(t / year)^*1

Can be scrolled horizontally

Ordinance-designated number	Substance	Total emissions	Emissions				Sewage	Off-site
Ordinance-designated number	Substance	Total emissions	Emissions into atmosphere	Emissions into water	Emissions into land	Business site landfill disposal	Sewage	Off-site
1-001	Zinc compounds (water-soluble)	1.5	0.0	1.5	0.0	0.0	0.0	0.0
1-017	Acetaldehyde	7.4	0.7	1.4	0.0	0.0	0.0	5.3
1-028	Allyl alcohol	9.2	0.0	9.2	0.0	0.0	0.0	0.1
1-075	Ethylene oxide	2.9	0.0	2.9	0.0	0.0	0.0	0.0
1-088	1,2-Epoxypropane	2.3	0.0	0.0	0.0	0.0	0.0	2.2
1-173	1,4-Dioxane	1.1	0.0	0.0	0.0	0.0	0.0	1.1
1-176	Cyclohexane	1.9	0.1	0.0	0.0	0.0	0.0	1.8
1-213	Dichloromethane	1.3	0.0	0.0	0.0	0.0	0.0	1.3
1-275	Styrene	2.5	2.5	0.0	0.0	0.0	0.0	0.0
1-302	Tetrahydrofuran	41.5	30.4	0.0	0.0	0.0	2.1	9.0
1-321	Triethylamine	6.8	5.5	0.0	0.0	0.0	0.0	1.3
1-347	Toluene	41.7	12.0	0.0	0.0	0.0	0.2	29.5
1-354	Nickel	3.6	0.0	0.1	0.0	0.0	0.0	3.5
1-364	Paraformaldehyde	37.5	0.0	0.0	0.0	0.0	0.0	37.5
1-380	(1-Hydroxyethane-1,1-diyl) diphosphonic acid and its potassium and sodium salts	3.9	0.0	3.9	0.0	0.0	0.0	0.0
1-458	Boron compounds	1.8	0.0	1.8	0.0	0.0	0.0	0.0
1-464	Formaldehyde	2.4	2.4	0.0	0.0	0.0	0.0	0.0
1-466	Acetic anhydride	9.2	0.0	0.0	0.0	0.0	0.0	9.2
	Others^*2	12.4	2.6	0.0	0.0	0.0	0.0	9.8
	Total	191.0	56.1	20.8	0.0	0.0	2.4	111.6

*1

The threshold for amounts handled at each workplace was 1 tonne/year.
*2

Substances 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 mid-term target to be achieved by FY2030/3, the Daicel Group has set a volatile organic compound (VOC) emissions reduction target of 53% (less than 1,000 tonnes) or more from levels in FY2001/3 (2,136 tonnes) at Daicel’s business sites and domestic Group companies.

Total VOC emissions from the Daicel Group for FY2026/3 were 974 tonnes. For domestic Group companies, emissions increased compared with the previous fiscal year due to the inclusion of additional companies in the data collection scope. For the Daicel Group as a whole, however, VOC emissions decreased by 3% year on year, partly due to changes in plant operating conditions.

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 FY2026/3.

Mid-term Target and Results (Daicel’s Business Sites and Domestic Group Companies)

FY2031/3 Target: Reduce VOC emissions by 62% from FY2001/3 levels (emissions of 858 tonnes or less)
FY2026/3 Results: Achieved 54% VOC emissions reduction from FY2001/3 levels (974 tonnes in emissions)

VOC Emissions (Daicel’s Business Sites and Domestic Group Companies)

2021年度は当社事業場が991トン・国内グループ企業が21トン・合計1,012トン、2022年度は当社事業場が1,163トン・国内グループ企業が10トン・合計1,173トン、2023年度は当社事業場が1,102トン・国内グループ企業が8トン・合計1,110トン、2024年度は当社事業場が994トン・国内グループ企業が11トン・合計1,005トン、2025年度は当社事業場が857トン・国内グループ企業が117トン・合計974トン。

ESG Data Refer to page 3 "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).

The treatment of highly concentrated PCB waste held by the Daicel Group was completed in FY2022/3, and we anticipate completing the treatment of low-concentration PCB waste by FY2027/3.