項(xiàng)目 

Item

工業(yè)級(jí) 

Industrial Grade

食品級(jí) 

Food Grade

主含量                  %

Main content

≥98.0

≥98.0

五氧化二磷(以P₂O₅計(jì))     %

Phosphorus pentoxide (as P₂O₅)

≥39.5

≥39.5

甲基橙鹼度（以Na₂O計(jì)） 

Methyl orange alkalinity (as Na₂O)

36-40

36-40

重金屬（以Pb計(jì)）       %

Heavy metal (as Pb)

——

≤0.001

砷（以As計(jì)）           %

Arsenic (as AS)

——

≤0.0003

氟化物（以F計(jì)）        %

Fluoride (as F)

——

≤0.005

水不溶物                %

Water insoluble

≤0.10

≤0.10

外觀 

Appearance

白色粉末 

White power

白色粉末 

White power