Low Moisture 2-Chlorobenzaldehyde CAS 89-98-5 Anhydrous Grade 0.05% Water Liquid

A Grignard reaction quenched by a fraction of a percent of water costs yield twice: the reagent is consumed and the resulting magnesium hydroxide cloud makes the work up slow. 2-Chlorobenzaldehyde (CAS 89-98-5) is used in organometallic and moisture sensitive routes, so the water content of the aldehyde, not just its assay, becomes a process critical parameter.

This anhydrous grade is dried by azeotropic distillation with a high purity hydrocarbon entrainer, filtered and filled under argon with a molecular sieve in the drum headspace. Water is specified at 0.05 percent maximum and verified by Karl Fischer titration on every lot, and the acid content is held at 0.02 percent so the aldehyde does not consume base before the reaction starts.

• Water 0.05% maximum by Karl Fischer: no reagent loss in Grignard, organolithium and other moisture sensitive steps
• Argon blanketed with molecular sieve: moisture does not creep back during transport or partial use in the plant
• Acidity 0.02% maximum: no premature consumption of base or catalyst in the reaction charge
• Azeotropic drying, not chemical drying: no drying agent residues or salts left in the product
• Assay 99.5% minimum: process critical quality parameters verified together on the same lot
• Drum headspace sampling port: the plant can verify dryness on arrival without opening the drum to atmosphere

Used in organometallic and moisture sensitive synthesis, in the preparation of Grignard derived alcohols and amines, in the synthesis of moisture sensitive intermediates for pharmaceutical process development, and where a dry aldehyde feed is required for a continuous flow reactor.

Transfer under argon and use a closed cannula or a pump rather than an open pour; the headspace sieve should be replaced if the drum is held for more than six months after opening. Our technical note gives a Karl Fischer check procedure for incoming inspection and the expected water pick up in an open container.

Supplied in 25 kg and 100 kg iron drums with phenolic epoxy lining, argon blanketed with a molecular sieve cartridge in the headspace. Drums carry lot number, assay, water content at release and a sampling port label.

Store between 5 and 25 degrees C under argon, away from moisture sources and light. Delivery takes 7 to 15 working days; for pilot quantities we supply 1 kg amber glass bottles purged with argon.

Each lot is released with a Certificate of Analysis reporting assay, water by Karl Fischer, acidity, chlorobenzoic acid, colour and density, with the GC chromatogram attached. A 200 g retention sample is sealed under argon for 18 months.

We provide a GHS safety data sheet, an incoming inspection note including the Karl Fischer method, and a handling instruction for argon transfer. Independent verification of water content can be arranged before shipment on request.