Why is commercial mCPBA usually offered below 99% assay?

Commercial mCPBA is commonly supplied as a controlled wet or stabilized composition rather than as neat peracid. The quotation and lot COA should state active mCPBA assay and the balance of water, m-chlorobenzoic acid, stabilizer or diluent, as applicable.

Which mCPBA COA value should be used to calculate reaction charge?

Use the lot-specific active mCPBA assay, or an agreed active-oxygen result. The COA should also identify m-chlorobenzoic acid, water and the stabilizer or diluent balance.

Can mCPBA be packed in a standard chemical drum?

Packaging cannot be selected by volume alone. The exact composition, package material, venting, fill quantity, temperature limits and destination transport rules must be reviewed together.

What must be checked before scaling up a new mCPBA grade?

Confirm active assay and composition, then assess reaction heat release, dosing, hold time, impurity profile and quench behavior at controlled scale before approval for plant-scale processing.

What information is required to quote and ship mCPBA?

State active assay, required quantity, destination, receiving capability and delivery window. Request written confirmation of the exact composition, compatible package, temperature controls and transport documents before approval.

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

mCPBA , CAS 937-14-4 and EC 213-322-3 , is meta-chloroperoxybenzoic acid with formula C7H5ClO3 and molecular weight 172.57 g/mol. Commercial mCPBA is commonly supplied as a wetted or otherwise stabilized composition rather than as neat peracid. Procurement must state active mCPBA assay, active oxygen, m-chlorobenzoic acid, water and stabilizer or diluent balance, plus organic-peroxide packaging, temperature and transport requirements.

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 supplied form or concentration, assay, reactive impurities, stabilizer or inhibitor status, storage controls and handling requirements against the current COA and SDS.
Package: State the required active assay, quantity and destination; confirm the supplier-approved organic-peroxide package, net fill, venting if applicable, temperature limits and dangerous-goods requirements against the current SDS.

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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
Commercial definition	Stabilized composition with stated active assay

mCPBA is an organic peroxyacid oxidant. The neat-component formula identifies the active compound, but the commercial product specification must also describe water, m-chlorobenzoic acid and any stabilizing or diluting components.

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

Store only in the supplier-approved organic-peroxide package and temperature range, away from heat, contamination, reducing agents and incompatible materials. Avoid friction, impact and confinement conditions identified in the SDS. Use trained handling and emergency procedures.

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 usually offered below 99% assay?

A: Commercial mCPBA is commonly supplied as a controlled wet or stabilized composition rather than as neat peracid. The quotation and lot COA should state active mCPBA assay and the balance of water, m-chlorobenzoic acid, stabilizer or diluent, as applicable.
Q:
Which mCPBA COA value should be used to calculate reaction charge?

A: Use the lot-specific active mCPBA assay, or an agreed active-oxygen result. The COA should also identify m-chlorobenzoic acid, water and the stabilizer or diluent balance.
Q:
Can mCPBA be packed in a standard chemical drum?

A: Packaging cannot be selected by volume alone. The exact composition, package material, venting, fill quantity, temperature limits and destination transport rules must be reviewed together.
Q:
What must be checked before scaling up a new mCPBA grade?

A: Confirm active assay and composition, then assess reaction heat release, dosing, hold time, impurity profile and quench behavior at controlled scale before approval for plant-scale processing.
Q:
What information is required to quote and ship mCPBA?

A: State active assay, required quantity, destination, receiving capability and delivery window. Request written confirmation of the exact composition, compatible package, temperature controls and transport documents before approval.

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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