Name | Potassium fluoride dihydrate |
Synonyms | Potassium fluoride dihydrate Potassium fluoride hydrate, pure potassium fluoride dihydrate, puratronic POTASSIUMFLUORIDE,DIHYDRATE,CRYSTAL,REAGENT |
CAS | 13455-21-5 |
EINECS | 627-039-1 |
InChI | InChI=1/FH.K.2H2O/h1H;;2*1H2/q;+1;;/p-1 |
Molecular Formula | FH4KO2 |
Molar Mass | 94.13 |
Density | 2,454 g/cm3 |
Melting Point | 41°C(lit.) |
Boling Point | 1505°C |
Water Solubility | SOLUBLE |
Vapor Presure | 24.5mmHg at 25°C |
Appearance | Liquid |
Specific Gravity | 2.454 |
Color | Colorless |
Exposure Limit | ACGIH: TWA 2.5 mg/m3NIOSH: IDLH 250 mg/m3 |
Merck | 14,7632 |
Storage Condition | Refrigerator (+4°C) |
Stability | hygroscopic |
Sensitive | Hygroscopic |
Refractive Index | 1.352 |
Use | Used as flux for silver welding and flux for metallurgical processing |
Risk Codes | 23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. |
Safety Description | S36/37 - Wear suitable protective clothing and gloves. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
UN IDs | UN 1812 6.1/PG 3 |
WGK Germany | 3 |
RTECS | TT0705000 |
FLUKA BRAND F CODES | 3-10 |
TSCA | T |
HS Code | 28261990 |
Hazard Note | Harmful |
Hazard Class | 6.1 |
Packing Group | III |
colorless monoclinic crystal or white crystalline powder. Deliquescence. Melting point 41 ℃; Boiling point 156 ℃;d 454. Soluble in water (18 ℃,349. 3G/lOOmL). The solution is alkaline. Insoluble in anhydrous ethanol. Corrosion of glass and ceramics.
potassium hydroxide (or potassium carbonate) was dissolved in water, pure hydrogen fluoride was introduced, and the mixture was left to settle. After filtration, the filtrate was concentrated under vacuum and the crystals obtained were washed with a small amount of water. After recrystallization, potassium fluoride was obtained.
analysis reagent, trace analysis of elements such as tantalum. They are also used as complexing agents, masking agents, bacterial inhibitors, and the like.
toxic; Has a stimulating effect on the skin and eyes. Staff should be well protected, if accidentally touch the eyes, should immediately rinse with a large amount of flowing water. The working environment should have good ventilation conditions. Store in a cool, dry warehouse. Avoid co-storage and transportation with food and acid and alkali substances.
Application | used as flux for silver welding, flux for metallurgical processing |