Why is commercial mCPBA not normally specified as 100% active material?

Commercial mCPBA is commonly supplied as a wetted, desensitized mixture with a declared peracid assay; water and meta-chlorobenzoic acid may make up much of the balance. Confirm active mCPBA, total composition and assay method instead of treating the pure-component formula as the delivered specification.

How should the required quantity of mCPBA be calculated?

Base reaction and purchasing calculations on the verified active-peracid assay of the offered batch, not on total product mass alone. Confirm the assay basis, relevant chlorobenzoic acid content, water, active oxygen if reported and retest date, then apply the actual batch value in the process charge calculation.

Which packaging and logistics details matter for mCPBA?

Confirm approved wetted composition, package size, temperature range, segregation, transport classification and destination acceptance before shipment. Do not request drying or concentration unless a validated procedure specifically permits it; review the current SDS and supplier handling instructions for this organic peroxide material.

mCPBA (meta-Chloroperoxybenzoic Acid) CAS 937-14-4

mCPBA, also called meta-chloroperoxybenzoic acid or 3-chloroperoxybenzoic acid, CAS 937-14-4, EC 213-322-3, is meta-chloroperoxybenzoic acid with formula C₇H₅ClO₃ and molecular weight 172.57 g/mol. The pure-component formula identifies the active compound but does not define the specification of an offered commercial material. Before evaluating a quotation, confirm the active assay, composition, relevant impurities, packaging, temperature controls and transport requirements from current supplier documentation.

CAS: 937-14-4
Synonyms: mCPBA, meta-Chloroperoxybenzoic acid, 3-Chloroperoxybenzoic acid, m-Chloroperbenzoic acid
Einecs: 213-322-3
Molecular Formula: C₇H₅ClO₃
Grade: Confirm the active assay, supplied composition, relevant impurities and handling requirements for the offered material against current supplier documentation. Do not infer a stabilized, wetted or neat form from the CAS number alone.
Package: State required quantity and destination. Packaging, fill, temperature controls and dangerous-goods requirements must be confirmed for the proposed material using its current SDS and transport classification.

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Product Description

1 Identity and specification

2 Quality controls for purchasing

3 Applications and grade selection

4 Storage and handling

5 Documentation and quotation details

Identity and specification

Item	Verified purchasing information
Product	mCPBA; meta-chloroperoxybenzoic acid
CAS / EC	937-14-4 / 213-322-3
Formula / molecular weight	C7H5ClO3 / 172.57 g/mol
Procurement boundary	Offered composition and active assay require confirmation

mCPBA is an organic peroxyacid oxidant. The pure-component formula identifies the active compound but does not establish an offered material’s active assay, water content, stabilizer or diluent, package or transport classification. Those properties must be confirmed against current product documentation.

Quality controls for purchasing

Specify active mCPBA assay and active oxygen using agreed methods.
Set limits for m-chlorobenzoic acid, water, stabilizer or diluent balance and other related substances.
Approve package, maximum quantity, temperature controls and transport classification for the offered composition.

Applications and grade selection

mCPBA is used in controlled epoxidation, Baeyer-Villiger oxidation and oxidation of sulfides, amines or other compatible substrates. Reaction scale-up requires calorimetric, compatibility and quench assessment; the selected assay directly affects stoichiometry.

Storage and handling

Use the current product SDS, shipping label and site risk assessment to define permitted packaging, storage controls and handling for the proposed material. Do not infer the commercial composition, transport classification or temperature limits from the CAS identity alone.

Documentation and quotation details

State active assay, active oxygen, impurity and water limits, quantity, package, destination and receiving capability. Review COA, SDS, transport classification, temperature controls and emergency information before confirming supply.

FAQ - Technical & Supply Chain

Q:
Why is commercial mCPBA not normally specified as 100% active material?

A: Commercial mCPBA is commonly supplied as a wetted, desensitized mixture with a declared peracid assay; water and meta-chlorobenzoic acid may make up much of the balance. Confirm active mCPBA, total composition and assay method instead of treating the pure-component formula as the delivered specification.
Q:
How should the required quantity of mCPBA be calculated?

A: Base reaction and purchasing calculations on the verified active-peracid assay of the offered batch, not on total product mass alone. Confirm the assay basis, relevant chlorobenzoic acid content, water, active oxygen if reported and retest date, then apply the actual batch value in the process charge calculation.
Q:
Which packaging and logistics details matter for mCPBA?

A: Confirm approved wetted composition, package size, temperature range, segregation, transport classification and destination acceptance before shipment. Do not request drying or concentration unless a validated procedure specifically permits it; review the current SDS and supplier handling instructions for this organic peroxide material.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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