L-Cysteine, Industrial Grade, is a sulfur-containing non-essential amino acid, whose core functional group is the sulfhydryl group (-SH). It typically appears as a white crystalline powder or granules with a slight characteristic sulfur odor.

Sodium Metabisulfite is an inorganic compound that can be viewed as the condensed product of two molecules of sodium bisulfite. It appears as a white or yellowish crystalline powder with a strong, pungent sulfur dioxide (SO₂) odor.

Xanthan Gum, Industrial Grade, is a high molecular weight polysaccharide polymer produced by the fermentation of Xanthomonas campestris. Its production standards and quality control focus on meeting the performance requirements of industrial applications rather than food safety.

Citric Acid, Industrial Grade, is an important organic acid primarily produced by microbial fermentation. It appears as white or slightly yellow crystalline powder or granules, is odorless, and has a strongly sour taste.