CAS 84-74-2 · TSCA · United States of America

Dibutyl phthalate (DBP) under TSCA

C16H22O4 · 邻苯二甲酸二丁酯

Status: Active. Dibutyl phthalate is on the TSCA Active Inventory. **California Proposition 65 listing: DBP listed 2 December 2005 as developmental toxicant + female reproductive toxicant + male reproductive toxicant (all three endpoints on the same date) via the Authoritative Bodies mechanism (NTP-CERHR)** (sourced to OEHHA https://oehha.ca.gov/proposition-65/chemicals/di-n-butyl-phthalate-dbp; MADL 8.7 ug/day). **TSCA Risk Evaluation: EPA designated DBP as one of the first 10 chemicals for risk evaluation under TSCA Section 6(b) amended by Frank R. Lautenberg Chemical Safety for the 21st Century Act (2016); EPA finalized Risk Evaluation for DBP and is in Risk Management Rule development phase** (verify current TSCA Section 6(b) Risk Evaluation + Risk Management Rule status against https://www.epa.gov/assessing-and-managing-chemicals-under-tsca before relying). **Consumer Product Safety Improvement Act (CPSIA) 2008: DBP banned in children's toys + child-care articles at >0.1% by mass (sections 108 + 16 CFR 1307)** (sourced to https://www.cpsc.gov/Business--Manufacturing/Business-Education/Toy-Safety + 16 CFR 1307 to verify). **FDA: DBP is permitted in food-contact materials with use restrictions per 21 CFR 175 + 178** (verify current scope against ecfr.gov before relying). **TSCA Section 6(h) Persistent, Bioaccumulative, Toxic (PBT) chemical evaluation: DBP NOT among PBT chemicals listed under TSCA Section 6(h)** (verify against https://www.epa.gov/assessing-and-managing-chemicals-under-tsca/risk-management-existing-chemicals).

Dibutyl phthalate is TSCA-Active with **California Proposition 65 listing 2 December 2005 as developmental + female + male reproductive toxicant on the same date via the NTP-CERHR Authoritative Bodies mechanism (sourced to OEHHA) + CPSIA 2008 BAN in children's toys + child-care articles at >0.1% by mass (sourced to 16 CFR 1307) + TSCA Section 6(b) Risk Evaluation finalized + Risk Management Rule in development phase**. OSHA PEL 5 mg/m3. NO active US AD/CVD on Chinese-origin DBP. **Cal Prop 65 + CPSIA + TSCA Section 6(b) Risk Management Rule are the practical US-channel compliance pivots.**

Listing and threshold

Substance Dibutyl phthalate (DBP) (CAS 84-74-2), C16H22O4
Regime US Toxic Substances Control Act (TSCA), administered by EPA
Jurisdiction United States of America
Status Active
Tonnage threshold TSCA Section 8(a) Chemical Data Reporting (CDR) at >25,000 lb/year per US site

Classifications under this regime

  • TSCA Active Inventory
  • **California Proposition 65 listing: DBP listed 2 December 2005 as developmental toxicant + female reproductive toxicant + male reproductive toxicant (all three endpoints on the same date) via the Authoritative Bodies mechanism (NTP-CERHR); MADL 8.7 ug/day** (sourced to OEHHA https://oehha.ca.gov/proposition-65/chemicals/di-n-butyl-phthalate-dbp)
  • **TSCA Section 6(b) Risk Evaluation: DBP designated as one of first 10 chemicals + Risk Evaluation finalized + Risk Management Rule in development** (verify current status against https://www.epa.gov/assessing-and-managing-chemicals-under-tsca before relying)
  • **Consumer Product Safety Improvement Act (CPSIA) 2008: DBP banned in children's toys + child-care articles at >0.1% by mass (16 CFR 1307)** (sourced to https://www.cpsc.gov/ + 16 CFR 1307 to verify)
  • OSHA PEL: 5 mg/m3 8-hr TWA per 29 CFR 1910.1000 Table Z-1 (verify against https://www.osha.gov/annotated-pels before relying)
  • NIOSH REL: 5 mg/m3 8-hr TWA (verify against current https://www.cdc.gov/niosh/npg/)
  • ACGIH TLV-TWA: 5 mg/m3 inhalable typically (verify against current ACGIH TLV documentation at https://www.acgih.org/ before relying)
  • IARC: Not classified (verify against https://monographs.iarc.who.int/ before relying; DBP not separately evaluated by IARC)
  • DOT 49 CFR: NOT regulated as dangerous goods at solid / liquid form
  • **FDA permitted in food-contact materials with use restrictions per 21 CFR 175 + 178** (verify against ecfr.gov before relying)

Restrictions and conditions of use

  • **California Proposition 65 reproductive-toxicant warning required where placed in California consumer + workplace channel above safe-harbor MADL 8.7 ug/day** (sourced to OEHHA 2 December 2005 listing for developmental + female + male reproductive endpoints; https://oehha.ca.gov/proposition-65/chemicals/di-n-butyl-phthalate-dbp)
  • **CPSIA 2008 BAN in children's toys + child-care articles at >0.1% by mass (16 CFR 1307)**
  • **TSCA Section 6(b) Risk Management Rule in development**
  • OSHA PEL 5 mg/m3 8-hr TWA (29 CFR 1910.1000 Table Z-1)
  • EPA TRI reporting for phthalates (verify against https://www.epa.gov/toxics-release-inventory-tri-program)
  • NO active US AD/CVD case on Chinese-origin dibutyl phthalate currently (verify against access.trade.gov before invoicing)

Importer obligations

TSCA Section 13 import certification (positive). **California Proposition 65 reproductive-toxicant warning labelling for Chinese-origin DBP placed in California channel above safe-harbor MADL.** **CPSIA 2008 BAN: NOT permitted in children's toys + child-care articles at >0.1% by mass.** **TSCA Section 6(b) Risk Management Rule may impose additional restrictions; current Risk Management Rule development phase.** Major non-Chinese producers: ExxonMobil (USA Houston TX), Eastman Chemical (USA Kingsport TN), KH Neochem (Japan), JSR (Japan). Major Chinese exporters: Beijing Yanshan Petrochemical (Sinopec) + Anhui Yifeng + Hangzhou Hangwei + Jiangsu Pengrun + Shandong Hongxin Chemicals.

Required documents

  • TSCA Section 13 import certification
  • CBP entry HS 291732 (esters of orthophthalic acid; dibutyl phthalate)
  • SDS (Repr. 1B + Aquatic Chronic 4 + Cal Prop 65 reproductive toxicant 1990 + CPSIA toy ban)
  • **California Proposition 65 reproductive-toxicant warning label where placed in California channel above safe-harbor MADL**
  • **CPSIA 2008 compliance documentation where placed in children's toy / child-care article supply chain (must be <0.1% by mass)**
  • EPA TRI reporting documentation where placed at threshold

Common compliance traps

The pitfalls that have bitten importers on this lane in the past. None of these is theoretical.

  • **California Proposition 65 listing 2 December 2005 as developmental + female + male reproductive toxicant (all three endpoints same date, NTP-CERHR Authoritative Bodies mechanism); Cal Prop 65 warning required for any Chinese-origin DBP placed in California channel above safe-harbor MADL 8.7 ug/day**
  • **TSCA Section 6(b) Risk Evaluation finalized + Risk Management Rule in development; first 10 chemicals priority**
  • **CPSIA 2008 BAN in children's toys + child-care articles at >0.1% by mass (16 CFR 1307)**
  • OSHA PEL 5 mg/m3 8-hr TWA
  • NO active US AD/CVD case on Chinese-origin DBP currently
  • **Use in PVC progressively replaced by higher-molecular-weight phthalates (DEHP successor + DINP + DIDP) and non-phthalate plasticisers (DOTP + adipates + trimellitates) due to reproductive-toxicity classification**

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for dibutyl phthalate (dbp), see the CAS 84-74-2 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the dibutyl phthalate (dbp) cornerstone hub covers the full sourcing chain.

For the structure and history of TSCA, see the TSCA glossary entry.

Need cross-jurisdiction compliance support on this substance? Run it through the REACH / TSCA / IECSC / AICIS / K-REACH checker, or send us the substance and the destination and we will quote FOB China and CIF / DDP landed including the regulatory work on the destination side.

Read next

Cross-jurisdiction profile and sourcing references

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