Tankage

Name:
Tankage
Detailed information:

Chemistry name:	animal tankage; tankage rough ammoniate
Grade:
Based on percentage of ammonia and bone phosphate. A medium grade has 10% ammonia and 20% bone phosphate. Concentrated tankage has had the boiled-down tank liquor and press water added to it before drying and runs 15–17% ammonia.
Hazard:
Flammable, may ignite spontaneously.