Sodium Fluoride China CAS NO.7681-49-4

items

pharmaceutical grade /reagent grade

toothpaste grade

industrial grade

standard

usp-34

usp-34

gb/t 1264-1997

assay %

98.0-102.0

≥99.0

≥98.5

water insoluble%

≤0.05

≤0.01

≤0.1

volatile organic matter %

passed the test

passed the test

passed the test

sulfate (so₄) %

≤0.01

≤0.03

≤0.05

heavy metal %

≤0.003

≤0.003

≤0.005

pb ppm

≤10

≤10

≤20

arsenic (as) ppm

≤2

≤2

≤5

acidity (h⁺) %

≤0.05

≤0.1

≤0.2

alkalinity (oh^-) %

≤0.04

≤0.08

≤0.16

chloride (cl) %

≤0.012

≤0.012

≤0.02

fluorosilicates (sif6) %

≤0.001

≤0.002

≤0.6

fe %

≤0.001

≤0.002

≤0.005

ph (5% aq. solution)

6.5-8.0

6.5-8.0

6.5-8.0

intermediate inspection

appearance identification

white powder

white powder

white powder

loss on dry (150℃/4h) %

≤1.0

≤0.2

≤0.2

whiteness (70-90umgranularity) %

≥98

≥95

≥90

transmission (3% aq. solution) %

≥98

≥90

≥85

granularity (u.s.screen) mesh

90% pass 30-100 mesh

95% pass 20-150 mesh

90% pass 20-150 mesh

shelf life year

two years

two years

two years

supply reference

production process

second refined

99% hydrofluoric acid, sodium carbonate

industrial products as raw materials

packing

25kg plastic paper bag four-layer /20t/(20')fcl

25kg plastic paper bag three layers/20t/(20')fcl

25kg composite bag/20t/(20')fcl