Where the raw materials come from

The first practical obstacle: the industry that makes these materials is not set up to sell to somebody making twenty liters.

An industrial supply chain

Surfactants, solvents, builders, chelators and preservatives are commodity and specialty chemicals sold by distributors in drums and totes.

A drum is a year's supply for a small maker and a cash commitment that will not be repeated soon enough to matter.

Getting served at small volume

Specialist suppliers repack into liters and kilos for formulators and small manufacturers. They charge a premium, they carry the documentation, and they are where almost everybody starts.

Some distributors will sell smaller quantities to a registered business with an account, which is worth asking once the range is settled.

And a co-packer buys at industrial scale on your behalf, which is one of the real arguments for contracting out earlier than you would in other crafts.

What to ask for

A safety data sheet, always, for everything. It is the basis of your own hazard labeling and your workplace safety.

A technical data sheet: active content, recommended use levels, pH range, compatibility.

A certificate of analysis for the lot.

The exact concentration, because materials are sold as solutions at nominal strengths and your finished concentration depends on it, which matters where a regulatory threshold is involved.

And biodegradability or environmental data if you intend any green claim, since the Green Guides require substantiation and the supplier is where it comes from.

Buying quantity

Most of these materials keep well, so volume buying is lower risk than in a food craft.

The exceptions are anything that oxidizes, anything with a stated shelf life, and fragrance.

Store in the original container with the label intact, because the label is the link to the SDS and the lot.

References