1）Chemical reaction with MgSO4 forms white precipitate.
2) Residue on ignition reacts as sodium salts
Property
800-1500mPa.s(0.2%、25℃、30rpm)
Free alkali
NOT react with phenolphthalin
Ulfate（MgSO4）
≤0.5%
（120℃，4h）
Loss on drying
≤10%
Inition residue
≤76%
Heavy metals（Pb）
≤0.001%
Arsenic（AS2O3）
≤0.0002%
Residual monomers
≤1%
（Under 1000）
Low polymer
≤5%
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