Kind	PAA	PAAS
Appearance	Colorless or pale yellow  viscous liquid
Solid content	≥25.0 (certified) ≥30.0 (first-level)	≥30.0%
Monomer(as AA)	≤1.25% (certified) ≤0.5% (first-level)	≤1.0%
Iron(as Fe)	≤0.0020%
Density(20℃ g/cm3)	≥1.08	≥1.15
pH (1%  water solution)	≤2.00	6.0~8.0
dl/g, limiting viscosity(30℃)	0.055~0.10	0.055~0.10