HF

URI: https://gptkb.org/entity/HF
GPTKB entity
AI-created image of HF
AI-created image
Statements (51)
Predicate Object
gptkbp:instanceOf gptkb:chemical_compound
gptkbp:acidStrength strong acid in concentrated form
weak acid in dilute aqueous solution
gptkbp:antidote gptkb:calcium_gluconate
gptkbp:appearance colorless gas or fuming liquid
gptkbp:aroma pungent, irritating
gptkbp:autoignitionTemperature not flammable
gptkbp:band polar covalent
gptkbp:boilingPoint 19.5 °C
gptkbp:CASNumber 7664-39-3
gptkbp:chemicalFormula gptkb:HF
gptkbp:countryOfOrigin gptkb:European_Union
gptkb:United_States
gptkbp:density 0.991 g/cm³ (liquid at 25 °C)
gptkbp:discoveredBy gptkb:Carl_Wilhelm_Scheele
gptkbp:discoveredIn 1771
gptkbp:EC_number 231-634-8
gptkbp:GHSClassification gptkb:GHS05
gptkb:GHS06
gptkb:GHS09
gptkbp:hydrogenBonding strong
gptkbp:isConjugateBaseOf gptkb:fluoride
gptkbp:IUPACName gptkb:hydrogen_fluoride
gptkbp:mainEnvironmentalConcern gptkb:air_pollution
toxic to aquatic life
corrosive to infrastructure
gptkbp:mainIndustrialSource reaction of fluorite (CaF2) with sulfuric acid
gptkbp:meltingPoint -83.6 °C
gptkbp:molecularWeight 20.006 g/mol
gptkbp:NFPA704 Health 4, Flammability 0, Instability 0
gptkbp:otherName gptkb:hydrofluoric_acid
gptkbp:pKa 3.17
gptkbp:PubChem_CID 14917
gptkbp:riskFactor highly toxic
can cause systemic toxicity
causes severe burns
corrosive
tissue penetration and fluoride toxicity
gptkbp:solubility miscible
gptkbp:storage corrosion-resistant containers
gptkbp:structure diatomic molecule
gptkbp:UNNumber 1052
gptkbp:uses semiconductor industry
glass etching
metal cleaning
production of organofluorine compounds
gptkbp:vaporPressure 1.0 atm (at 19.5 °C)
gptkbp:bfsParent gptkb:Holmesdale_Fanatics
gptkb:VHF
gptkbp:bfsLayer 5
https://www.w3.org/2000/01/rdf-schema#label HF