Arsenic compounds are generally toxic, especially inorganic ones. Some organic arsenic compounds used as chemical weapons are also highly toxic, but naturally occurring organic arsenic compounds in seafood are less so.

Aniline resins are a type of resin that is formed by the reaction of formaldehyde and aromatic amines. The initial step in this reaction, known as hydroxymethylation, occurs in an alkaline environment and produces a basic condensate.

Urethane resins are formed by the condensation reaction of a urethane (carbamate) with an aldehyde. The reaction conditions determine whether a distinct compound or a resin is formed.

Melamine reacts with formaldehyde at pH 9–10 to form hexahydroxymethylmelamine. One mole of melamine combines with 6 moles of formaldehyde to produce hexahydroxymethylmelamine.

All urea–formaldehyde condensates containing the recurring unit urea-methyl, from monomolecular to high molecular products. During the 1970s, multiple revelations emerged regarding the composition of urea–formaldehyde resins.

Amino resins are a versatile class of materials with a wide range of applications. They are typically formed by the reaction of an amine with a formaldehyde, and can be further modified with a variety of other additives.

Amino resins are condensation polymers formed by the reaction of carbonyl compounds with compounds containing amino, imino, or amide groups. The reaction releases water, and the resulting products are oligomers, also known as prepolymers.

Cellulose ethers are typically white to yellowish powders or granules that are safe to use and have the ability to dissolve in water. While there are cellulose ethers that do not readily dissolve in water, their sales are minimal compared to the water-soluble varieties.

Biomass chemicals encompass a class of chemicals derived from renewable and organic sources. The majority of biomass materials comprise plant-based products or byproducts, although animal-derived substances like fats or manures are also included.

Polyureas refer to polymers with ureylene groups–NHCONH–in their polymer chain. Linear polyureas are thermoplastic polycondensation products, featuring either aromatic (R = arylene) or aliphatic (R = alkylene) structures.

Originally the term metallic soaps was only used for metal salts of fatty acids of naturally occurring animal fats (mainly tallow and lard) and vegetable fats.

Gelatin is a translucent, colorless, brittle (when dry), flavorless, edible, multifunctional protein polymer, hot-water extracted from “collagens” obtained from various animal and fish byproducts.