- ▸ Endothermic chemical blowing agent for low-density crosslinked polyethylene (XLPE) and EVA foams used in footwear, gaskets, and insulation.
- ▸ Foaming agent in PVC, rubber, and elastomer compounds where a fine, uniform closed-cell structure and lower decomposition temperature than azodicarbonamide is required.
- ▸ Cell-nucleating additive in extruded and injection-molded thermoplastic foams to reduce part weight and improve dimensional stability.
- ▸ Gas-generating component in self-skinning and microcellular foam systems for automotive trim, wire and cable insulation, and sealing profiles.
- ▸ Decomposes around 150-160 C releasing nitrogen gas, making it suitable for heat-sensitive polymer matrices that cannot tolerate higher-temperature blowing agents.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →⚠ WARNING: This product can expose you to 4,4′-Oxybis, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 201-286-1
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Regulatory restriction status
4,4′-Oxybis(benzenesulfonyl Hydrazide) (CAS 80-51-3) appears on the regulatory list(s) below. This is public regulatory information about the substance — not a statement about any specific supplier’s material, and not a safety claim. Confirm the current status for your jurisdiction and intended use.
- California Proposition 65: listed for reproductive toxicity, listed 7 Aug 2009. A California Proposition 65 warning applies (see the warning above).
Sources: ECHA Candidate List / Annex XIV / Annex XVII (echa.europa.eu); U.S. EPA TSCA; UN Stockholm Convention / EU POPs Regulation; California OEHHA Proposition 65 list. Retrieved 2026-07-13.