A practical supplier guide to citric acid anhydrous (CAS 77-92-9): what the water-free grade is, its spec sheet (C6H8O7, MW 192.12, EINECS 201-069-1, white crystalline powder, assay >=99.5%), how it is used across food, pharma, cosmetics, metal cleaning and wastewater treatment, plus buyer specification and storage notes.
A practical supplier guide to squalane (CAS 111-01-3): what the saturated hydrocarbon oil is, its spec sheet (C30H62, MW 422.81, EINECS 203-825-6, colorless liquid, density 0.81 g/mL), how it carries actives like GHK-Cu and kojic acid into the skin, plus handling, storage, and buying notes for formulators.
A practical supplier guide to kojic acid (CAS 501-30-4): what the fermentation-derived powder is, its spec sheet (C6H6O4, MW 142.11, EINECS 207-922-4), how it inhibits tyrosinase for skin brightening, and its parallel uses in food preservation, flavor precursors, pharma, and agriculture, plus handling and sourcing notes.
A practical supplier guide to 4'-ethylpropiophenone (CAS 27465-51-6): what the ketone is, its synonyms and spec sheet (C11H14O, MW 162.2, EINECS 2017-001-1), where it is used as an agrochemical, pharmaceutical, and specialty organic building-block intermediate, plus handling, packaging, and sourcing notes.
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