Who you buy from

Your supplier decides most of your product quality and all of your documentation, and in this category the documentation is part of the product.

Three tiers, and what each gives you

Hobby resellers decant into small quantities and are how people often start. Convenient, expensive per unit, and frequently unable to supply a certificate of analysis or a full specification.

Distributors sell trade quantities, supply proper documentation, and are where a serious brand should be as quickly as possible.

Manufacturers deal in large quantities with the best prices and the most technical support, and generally need volumes beyond a small brand.

The step that matters is the first one, because it is where documentation becomes available.

What a specification must contain

The INCI name, which goes on your label. The grade and purity. The recommended usage range. The pH range in which it is stable and effective. Its solubility, so you know which phase it belongs in. Its heat sensitivity, so you know when in the cool-down it goes in. And a certificate of analysis for the lot.

Without those you cannot write a formula responsibly, cannot label correctly, and cannot substantiate safety.

Minimums and the shelf-life trap

Better pricing comes with larger minimums, and raw materials have their own shelf lives. Oils go rancid, actives degrade, and a year's supply of an unstable ingredient is a year of decline purchased at a discount.

Unrefined oils and actives are the ones to buy small and often. Waxes, butters and most emulsifiers tolerate quantity.

Qualifying and keeping two

A new supplier for an existing ingredient is a reformulation, not a purchase. Different water content, trace impurities and particle size can move pH, emulsion stability or preservative efficacy in ways that pass an incoming check and surface later.

So qualify deliberately: a bench batch, a comparison against a retained sample, and a retest of anything the change could have affected.

And hold two qualified suppliers for anything critical. A single source for your preservative or your hero active means somebody else's stock problem becomes your production halt.

References