Commercial supply inquiries for epichlorohydrin (CAS 106-89-8) frequently under-specify the variables that determine a binding price. Epichlorohydrin is a strained oxirane intermediate with a pendant chlorine; industrial use spans epoxy resins, synthetic glycerol, polyamide-epichlorohydrin wet-strength resins, epichlorohydrin elastomers, and pharmaceutical intermediates. A single nominal purity value does not define a commercial grade. The acceptable water content, color, iron, and residual chlorinated aliphatics shift with the downstream unit operation. A liquid epoxy resin producer may accept water at 0.03%, while a synthetic glycerol producer running high-pressure hydrolysis may require water ≤0.01% and color ≤5 APHA to protect catalyst life.

Request an Epichlorohydrin Quotation: What We Need From You to Quote in 24 Hours

A quotation that can be returned within 24 hours depends on whether the requesting party supplies annual or spot volume, specification targets, packaging class, destination, and regulatory documentation requirements. Without these data, the supplier defaults to standard industrial grade in unlined steel drums, which may not meet the buyer’s application. The necessary inputs are as follows.

The 24-hour response window assumes the requesting party provides the specification and destination in the first inquiry. A buyer that asks only for a market price receives an indicative range with a validity of 24 h to 72 h, because spot ECH pricing moves with propylene, allyl chloride, and freight indices. The quotation is not binding until the COA parameters are matched to the application.

Without a defined assay, a quoted price is a placeholder. Representative industrial specifications for standard ECH are summarized in the table below. The values are not substitutes for a batch COA; they represent the common commercial range across propylene-chlorohydrin and glycerol-based producers. Method detection limits vary with the producer’s in-house ISO 17025 scope.

Buyers of high-purity ECH should not assume that standard grade is acceptable for pharmaceutical or food-contact resin applications. The difference between 99.90% and 99.95% assay may be less important than a residual allyl chloride peak or a total chloropropanols value, which standard tables do not report.

Which analytical parameters cause price shifts in ECH spot markets?

Price variation is less sensitive to headline purity than to water, color, iron, and chlorinated impurities. Among the impurity parameters, water content is the most common differentiator. Drying ECH to ≤0.005% requires dedicated molecular sieve drying or nitrogen-blanketed loading lines; this is not a simple post-treatment and adds fixed cost. A standard industrial grade at ≤0.01% water may ship in a standard lined ISO tank, whereas a low-water grade may require a dedicated tank with a nitrogen pad and a closed-loop unloading manifold.

Color is another variable. Standard ECH at ≤10 APHA is acceptable for many epoxy resin producers, but a polyether polyol or pharmaceutical intermediate may require ≤5 APHA. Color can increase during storage if iron pickup occurs from unlined steel or if the product is held above ambient temperature for extended periods. Iron at ≤0.3 mg/kg is common; a demand for ≤0.1 mg/kg will remove unlined steel logistics and require passivated or epoxy-phenolic lined packaging.

Epichlorohydrin storage stability and water-induced chloropropanol formation

Hydrolytic degradation of ECH follows pseudo-first-order kinetics with water; the reaction produces 3-chloro-1,2-propanediol and hydrochloric acid. In closed storage at ambient temperature, the hydrolysis rate is slow, but the acid by-product can autocatalyze further degradation. At elevated temperatures or in the presence of free water, the formation of chloropropanols increases. Published data for this specific configuration is limited; however, producers control the issue by maintaining ECH dry and by avoiding aqueous condensation inside storage vessels. Nitrogen blanketing is applied to lower moisture ingress and to keep the vapor space outside the flammability region.

Storage tanks and piping for ECH should be constructed of compatible materials such as stainless steel or lined carbon steel. Contact with strong bases, amines, concentrated acids, or metal halides should be avoided because these species can initiate oxirane ring-opening or polymerization. The flash point is reported at 31°C closed cup; therefore, storage should be below the flash point and away from ignition sources. Standard safety data sheets reference UN 2023, Class 6.1, Packing Group II, with a subsidiary flammability hazard.

Liquid epoxy resin synthesis consumes the largest share of ECH. In a typical batch or continuous process, bisphenol A is etherified with excess ECH under alkaline conditions. The ECH-to-bisphenol A molar ratio controls the epoxy equivalent weight of the finished resin. Excess ECH is recovered by distillation; water in the feed consumes sodium hydroxide and promotes hydrolysis of the diglycidyl ether. A resin producer targeting an epoxy equivalent weight of 188–192 g/eq under ASTM D1652 may require ECH water below 0.02% to avoid drift in viscosity and saponifiable chloride. In a 10 m³ reactor, 0.03% water in ECH introduces several kilograms of water per batch, which can shift stoichiometry and increase the load on the caustic recovery system.

Residual allyl chloride in ECH is an organic chloride impurity that can contribute to the saponifiable chloride fraction of the finished resin if it is not rejected during distillation. Standard resin producers monitor hydrolyzable chloride rather than total chlorine to distinguish oxirane-bound chlorine from organic chloride impurities. A buyer seeking ECH for high-purity epoxy resin applications should include hydrolyzable chloride limits in the inquiry, because the resin formulator may require ≤0.05% hydrolyzable chloride in the finished resin.

When epoxy resin producers request low-water ECH under nitrogen blanketing

When a buyer specifies water below 0.005%, the quotation changes because the product must be loaded under nitrogen pressure through a dedicated filter and sampled into pre-dried vials. The producer may assign a specific distillation fraction: the first and last cuts are often higher in water and low-boiling chlorinated impurities, while the heart cut is used for low-water grades. This practice reduces availability and increases the unit cost relative to standard grade. A resin producer that does not need low water may be overpaying if the request is copied from a prior specification without review.

Epichlorohydrin elastomers represent a smaller but specification-intensive application. In epichlorohydrin-ethylene oxide copolymerization, water in the monomer feed acts as a catalyst poison and reduces molecular weight. Producers in this segment often place tighter limits on water and oxygenated impurities than epoxy resin producers. A buyer requesting ECH for elastomer synthesis should state the catalyst system type, because a Ziegler-type catalyst requires essentially anhydrous feed, while a rare-earth catalyst may tolerate a slightly higher water level. Published data for this specific configuration is limited; producers rely on supplier COAs and internal catalyst activity tests.

Polyamide-epichlorohydrin wet-strength resins impose different constraints. The resin producer must control residual 1,3-dichloro-2-propanol and 3-chloro-1,2-propanediol because the final paper may contact food. Under 21 CFR 176.170, paper and paperboard components intended for contact with aqueous and fatty foods must meet migration limits. A quotation for ECH into this segment should include the supplier’s total chloropropanols data, because standard industrial grade may not satisfy a resin producer’s target. Buyers should also specify whether the ECH will be reacted with polyamidoamine in an aqueous system, because free water in the ECH feed is less critical than the impurities that carry into the final resin.

Low-water ECH shipments require nitrogen-padded ISO tanks and lined steel drums

Standard unlined steel ISO tanks are not typical for low-water or low-iron ECH. The product may pick up iron over transit times exceeding 10 days, and moisture ingress through pressure-relief devices can raise water content. Dedicated nitrogen-padded tanks with epoxy-phenolic linings, closed-loop vapor return, and pressure monitoring maintain the specification. For drum shipments, 200 L epoxy-phenolic lined steel drums with purge-tight closures are used for small-lot high-purity ECH. The quoted lead time for lined tanks is longer than for standard liquid chemical tanks, and a buyer should not request low-water ECH without checking tank availability.

UN 2023 logistics and documentation constraints

Transport class drives quotation cost more than bulk volume for small lots. Epichlorohydrin is assigned UN 2023, Class 6.1, Packing Group II, with a subsidiary flammability hazard. ADR, RID, and IMDG provisions require dangerous goods declarations, trained drivers, and route restrictions. A spot buyer with a dock that cannot accept a 24 t ISO tank should state this in the initial inquiry; otherwise the supplier quotes an ISO tank basis and the freight estimate is not executable. Documentation package options include the batch COA, safety data sheet, REACH registration confirmation, and ISO 17025 third-party inspection certificate. If the destination is outside the producer’s regulatory region, the quotation must include import clearance and possible TSCA or REACH status declarations.

For synthetic glycerol and pharmaceutical intermediate applications, the inquiry should specify residual chloropropanols, total chlorine, and the maximum allowed color after a standard storage interval. Pharmaceutical intermediate buyers should include residual 3-chloro-1,2-propanediol and total chloropropanol limits in the inquiry because these values determine whether dedicated purification columns are assigned and whether the product can be shipped in a shared chemical tank.