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Electronic Grade Hydrofluoric Acid

Formula: HF                                          

CAS No. 7664-39-3     Division Of Class: 8.1, corrosives presenting acidic properties   Physical and chemical properties: Formula is HF, and molecular  weight is 20.01, it is a kind of colorless and transparent liquid, and  the relative density is around 1.15-1.18. It can have a reaction with  normal metal, metallic oxide and hydroxide, generating all kinds of  salts. With high corrosivity, it can erode glass and silicate,  generating gaseous silicon tetra fluoride.  High purity hydrofluoric  acid can be used as highly acid detergent and corrodent, which can also  be used with nitric acid, glacial acetic acid, hydrogen peroxide and  ammonium hydroxide and etc,with certain proportion.   Application range: Hydrofluoric acid can be applied in solar  photovoltaic, LCD, semiconductor industries, mainly playing a role in  surface cleaning of silicon wafer, and cleaning and etching in chip  manufacture process. Besides, it can also be analytical reagent,  industrial chemical reagent in atomic energy and making high purity  chemicals containing fluorine.   Spec.: 

Chemical Properties

Guarantee


National Standard

EL Grade

UP Grade

UP-S Grade

UP-SS Grade

HF/%

40

49.0±0.5

49.0±0.5

49.0±0.5

49.0±0.5

Sulphate,ω/%≤

0.001

/

/

/

/

H2SiF6/ (mg/kg)≤

200

50

50

30

30

Cl/ (mg/kg)≤

5

5

5

0.2

0.05

NO3/ (mg/kg)≤

3

3

0.1

0.05

PO4/ (mg/kg)≤

1

1

1

0.1

0.05

SO4/ (mg/kg)≤

10

5

5

0.2

0.05

Fe/ (μg/kg)≤

500

100

10

1

0.1

Pb/ (μg/kg)≤

1000

100

10

1

0.1

Metal cation/ (μg/kg)≤

100

10

1

0.1

Particle

(≥1.0μm)/(个/mL)≤

25

(≥0.5μm)/(个/mL)≤

25

5

(≥0.2μm)/(个/mL)≤

20

Storage and packageIn transportation: it  should be carefully uploaded and discharged, no crashing, no damage, no  being heated and out of the rain. It should be stored in the well  ventilated warehouse.

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