specification of glycolic acid
items |
specifications |
appearance |
colorless or white crystal |
content(c2h4o3) |
≥99.0% |
clarity experiment |
pass |
water insoluble |
≤0.01% |
residue on ignition |
≤0.05% |
chroma(hazen) |
≤5 |
h2so4 experiment(darkened substances) |
pass |
chloride (cl) |
≤0.0005% |
sulfates ( so4) |
≤0.005% |
iron(fe) |
≤0.0005% |
heavy metals(pb) |
≤0.001% |
arsenic(as) |
≤0.002% |