… proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms. …
Explanatory notes
… in water but its ammonium and alkali metal salts dissolve readily in cold water to form viscous solutions. The … by the addition of gelling agents (e.g., calcium salts), retarders (e.g., phosphates, citrates), accelerators (e.g., organic acids), and regulators (e.g., sucrose, urea). Any such additions should …