Epichlorohydrin Supplier Verification: 7 Public Records That Confirm a Real Factory

Epichlorohydrin (ECH, CAS 106-89-8, EC 203-439-8) is a chlorinated monomer with molecular weight 92.52 g/mol, boiling point 116.1 °C at 101.3 kPa, and density 1.18 g/cm³ at 20 °C. The substance is consumed in the synthesis of liquid and solid epoxy resins, epichlorohydrin elastomers, paper wet-strength resins, and synthetic glycerin. It is transported as UN 2023, Class 3, Packing Group II, with a closed-cup flash point of 31 °C. Its flammability, acute inhalation toxicity, and suspected human carcinogenicity create overlapping public reporting obligations. A supplier’s certificate of analysis cannot by itself establish that a physical manufacturing site exists; verification must move to public records that contain site coordinates, unit operations, throughput, release history, and shipping activity.

Two industrial routes account for current commercial production. The conventional allyl chloride route converts propylene to allyl chloride, hypochlorinates allyl chloride to 1,3-dichloropropan-2-ol and 2,3-dichloropropan-1-ol, and then dehydrochlorinates the dichlorohydrin isomers in a saponification reactor using calcium hydroxide or sodium hydroxide. The glycerol route chlorinates glycerin with hydrogen chloride in a carboxylic acid catalyst and dehydrochlorinates the intermediate in a distillation-coupled reactor. Both routes require vacuum distillation and stabilizer management because epichlorohydrin polymerizes exothermically when contaminated by water, acid, or alkali. On a commercial distillation train, ECH is recovered in a vacuum column at an overhead pressure of 10–15 kPa absolute to keep reboiler temperatures low enough to suppress autopolymerization. The base stream contains high-boiling chlorinated homologues and is directed to a thin-film evaporator or hazardous waste incinerator. Column materials are typically glass-lined steel or stainless steel because chloride ions from process water can initiate pitting. A genuine manufacturing site will have these unit operations reflected in the permit equipment list.

An EPCRA Tier II hazardous chemical inventory submission, filed under 40 CFR 370, is the first public document to evaluate. Facilities storing epichlorohydrin above 10,000 lb (4,536 kg) annually submit the report to the Local Emergency Planning Committee and state emergency response commission. The filing lists maximum daily inventory, storage container type, specific location, and physical and health hazard codes. A production site typically reports ECH in a tank farm connected by transfer piping to a reactor battery, while a repackager reports drum storage near a loading dock. The report also includes secondary containment details and emergency contact information. The Tier II report is a presence indicator, not a production indicator; it must be cross-read with the records that follow.

The EPA Risk Management Plan registration under 40 CFR 68.10 and the OSHA Process Safety Management inventory under 29 CFR 1910.119 provide second-level confirmation. Epichlorohydrin appears in 29 CFR 1910.119 Appendix A at a threshold quantity of 1,000 lb (453.6 kg). A facility exceeding this threshold must implement mechanical integrity programs, process hazard analyses, operating procedures, and management of change. For a chlorohydrin-route ECH plant, the process hazard analysis typically addresses runaway polymerization in the saponification reactor, relief vent sizing, and corrosion under insulation from chlorinated water. The Risk Management Plan registration, where ECH is covered by 40 CFR 68.130, includes a worst-case release scenario and a five-year accident history. The complete risk management plan is not generally open to the public, but the registration status, facility identification number, and OSHA PSM citations can be obtained through compliance databases and disclosure requests.

Does a Title V air permit reveal a dedicated epichlorohydrin distillation train?

Title V operating permits issued under 40 CFR 70.6(a)(3) enumerate each emission unit, associated control device, and permitted throughput. For an epichlorohydrin plant, the permit should identify storage tanks, reactor vents, vacuum distillation columns, product receivers, and a control device such as a caustic scrubber or thermal oxidizer. A chlorohydrin-route plant will often list a hypochlorination reactor off-gas line sent to a hydrochloric acid scrubber, while a glycerol-route plant will list a chlorination reactor and a vacuum stripping column for water and excess HCl. Permit conditions typically specify a destruction efficiency for volatile organic compounds of at least 98 percent and a maximum epichlorohydrin emission rate in pounds per hour. Cross-referencing the permit unit ID with the Tier II storage coordinates can establish that the stored ECH is connected to a process area rather than an isolated repackaging line. A permit that lists only storage tanks, loading racks, and no chemical reaction equipment does not support a manufacturing claim.

The NPDES permit and its discharge monitoring reports, available through the US EPA Enforcement and Compliance History Online database, provide water-side operating evidence. A manufacturing site generally discharges spent brine, quench water, and distillation water containing chlorinated hydrolysis products. Permits may require monitoring for adsorbable organic halogens by ISO 9562, chemical oxygen demand by ISO 6060, and pH by ISO 10523. DMR data can show actual discharge flow, outfall-specific concentrations, and excursions. A genuine ECH production site is likely to report outfall analyses for 1,3-dichloropropan-2-ol and 2,3-dichloropropan-1-ol; a warehouse and repackaging operation has no such process wastewater permits. Published discharge coefficients for ECH plants vary with catalyst type and recovery efficiency, so site-specific DMR values are the authoritative reference.

Toxics Release Inventory reporting under EPCRA 313 and 40 CFR 372 creates a production-related release record. Facilities that manufacture or process more than 25,000 lb (11.34 metric tons) of epichlorohydrin in a calendar year file a Form R or Form A. The Form R includes total production-related waste, stack releases, fugitive releases, and off-site waste transfers. A manufacturer will show fugitive emissions from reactor vents, distillation seal leaks, and storage tank breathing; the waste profile typically includes still bottoms sent to a hazardous waste incinerator. A repackager does not meet the manufacturing threshold and will not appear in the TRI production query as a producer of ECH. The TRI Form R can be compared against the Title V permit unit list for consistency.

Customs Shipping Records and HS 2910.30 Verification

Customs bill of lading data, aggregated by trade data platforms and sometimes by customs agencies, identifies shipper and consignee names, HS code 2910.30, cargo weight, vessel, port of lading, and date of shipment. HS code 2910.30 covers 1-chloro-2,3-epoxypropane, the exact IUPAC name for epichlorohydrin. A manufacturing site should exhibit repeated shipment volumes over multiple years, with annual export quantities consistent with a reactor train rather than occasional drum sales. The loading terminal may be listed at the plant’s marine berth or an adjacent terminal connected by pipeline. Transshipment through intermediate ports can obscure the true origin, so the bill of lading should be cross-checked against port authority berth logs and terminal storage leases. A trader that appears only on the commercial invoice but not as the shipper of record does not satisfy the factory verification requirement.

When REACH and ISO certificates overlap with factory hazardous chemical licenses

An ISO 9001:2015 certificate can be used only if the annex scope explicitly includes epichlorohydrin production and the issuing body can be verified on the registrar’s public certificate register. The certificate number, site address, and scope statement must match the legal entity. Under REACH, EC No 1907/2006, an EU manufacturer or importer of epichlorohydrin must register the substance with ECHA. The public dossier for CAS 106-89-8 lists the registrant name, registration number, tonnage band, and supported uses. A manufacturing registrant typically appears in a substantial tonnage band; an import-only intermediary may show a lower band. In China, the hazardous chemical production license, environmental permit, and State Administration for Market Regulation business registration can be checked in provincial public databases. The license should list the production site, permitted product name, capacity, and validity period.

For epoxy resin synthesis, a commercial ECH assay is typically 99.5 wt% minimum, with water below 0.02 wt% and acidity below 0.001 wt% as acetic acid. Free residual epichlorohydrin in epoxy resins is measured by gas chromatography with headspace sampling; epoxy content is commonly determined by ASTM D1652. In ECH elastomer production, the monomer is copolymerized with ethylene oxide and allyl glycidyl ether in a solution or slurry process. ECH is stored under dry nitrogen, with oxygen excluded to limit peroxide formation, and contact with ammonia, amines, mineral acids, alkali hydroxides, and copper alloys is avoided.

Verification of a real ECH factory is strongest when at least three record classes align. The Tier II report confirms hazardous material presence; the Title V permit and NPDES permit confirm process unit operations; the TRI Form R confirms production-related waste generation; and the customs record confirms shipment activity. A supplier that can provide a valid REACH registration number, an ISO certificate with a manufacturing scope, and a Tier II filing is not automatically a verified manufacturer. The legal entity name, physical address, and site coordinates must be identical across all records. Any mismatch in address, capacity, or registration type requires a site-level explanation.