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IPC Subclass
C08H

DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS

Introduced: September 1968

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
Subclass:
DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS

Description

C08H covers chemical modifications and derivatives of naturally occurring macromolecules, including cellulose, starch, proteins, and polysaccharides obtained from plant or animal sources. This classification encompasses chemical reactions such as esterification, etherification, crosslinking, and substitution applied to natural polymers to alter their properties. Typical applications include modified cellulose products (acetates, ethers), chemically treated starches for industrial use, and protein-based materials with enhanced functionality. Adjacent classes C08B (polysaccharides) and C08G (synthetic macromolecular compounds) are distinguished by focusing on naturally derived starting materials rather than fully synthetic polymers or unmodified natural substances.

Scope Notes

Glossary: Factice Vulcanised oil, used as a substitute for rubber. | Limiting references: Food proteins e.g. Polysaccharides Natural rubber Graft polymers obtained by polymerising monomers on to polysaccharides, natural rubbers or derivatives thereof , Compositions of bituminous materials, e.g. asphalt, tar or pitch Natural resins or their derivatives Glue, gelatine Working up pitch, asphalt or bitumen

5 direct subcodes

Child Classifications

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  • C08H 3/00 Vulcanised oils, e.g. factice
  • C08H 7/00 Lignin; Modified lignin; High-molecular-weight products derived therefrom
  • C08H 8/00 Macromolecular compounds derived from lignocellulosic materials
  • C08H 99/00 Subject matter not provided for in other groups of this subclass