Ammoniac gum

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Ammoniac Gum


Ammoniac Gum

A complex gum/oil/resin mixture obtained from the stems of carrot family plant, Dorema ammoniacum, native to Iran and India. Ammoniac is a strong smelling exudate that dries to form hard, brittle, dark yellow lumps. It contains approximately 50-70% resin, 18-26% gum and 1-7% oil. Ammoniac is typically prepared for use either as a water emulsion or as a mixture with mastic and Isinglass. This makes a strong cement that is used to adhere gilding, set gemstones, and repair Porcelain. Ammoniac is also used in perfumes and medicine.

Synonyms and Related Terms

Dorema ammoniacum; gum ammoniac; goma amoniaco (Esp.); ammoniacum; ammoniakum; ammonial gum




  • Ingestion may cause vomiting.
  • Linde: SDS

Physical and Chemical Properties

Slightly soluble in water, ethanol, ether, vinegar or weak alkali. Forms emulsions with water.

Melting Point 45-55 C
Density 1.207 g/ml

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 664
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 518
  • George Savage, Art and Antique Restorer's Handbook, Rockliff Publishing Corp, London, 1954