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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