URI(s)
- http://id.loc.gov/authorities/subjects/sh2006007323
- http://id.loc.gov/authorities/sh2006007323#concept
Variants
- PPA (Polyphosphoric acid)
Broader Terms
Closely Matching Concepts from Other Schemes
Sources
- found: Work cat.: Polyphosphoric acid modification of asphalt, 2005:p. 2 (PPA is a liquid mineral polymer of a generic composition H n+2 Pn O3n+1 (CAS# 8017-16-1); has a minimum of two phosphorous atoms and minimum avg. molecular weight of 258; PPA can be derived from orthophosphoric acid by abstraction of water or by direct burning of phosphorus with the vapor's introduction into a hydrator which uses acidic sprays, forming P-O-P type bonds)
- found: Water treatment chemicals, 1991:p. 273 (Polyphosphoric acid; a clean, viscous liquid composition of a mixture of ortho, pyro, tri tetra, and more condensed acids)
Instance Of
Scheme Membership(s)
Collection Membership(s)
Change Notes
- 2008-10-02: new
- 2008-10-03: revised
Alternate Formats
