102403 Potassium dichromate

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Key Specifications Table

CAS #EC NumberHill FormulaChemical FormulaMolar MassGrade Value
7778-50-9 231-906-6 Cr₂K₂O₇ K₂Cr₂O₇ 294.19 g/mol Reag. USP

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      Glass bottle 80 g
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      Catalogue Number102403
      SynonymsPotassium bichromate, Potassium pyrochromate
      Product Information
      CAS number7778-50-9
      EC index number024-002-00-6
      EC number231-906-6
      GradeReag. USP
      Hill FormulaCr₂K₂O₇
      Chemical formulaK₂Cr₂O₇
      Molar Mass294.19 g/mol
      HS Code2841 50 00
      Quality LevelMQ100
      ApplicationPotassium dichromate volumetric standard, secondary reference material for redox titration, traceable to NIST SRM Certipur® Reag. USP. Potassium dichromate CAS No. 7778-50-9, EC Number 231-906-6.
      Biological Information
      Physicochemical Information
      Boiling point>500 °C (1013 hPa)
      Density2.7 g/cm3 (20 °C)
      Melting Point398 °C
      pH value3.6 (100 g/l, H₂O)
      Bulk density1250 kg/m3
      Solubility115 g/l
      Materials Information
      Toxicological Information
      LD 50 oralLD50 Rat 90.5 mg/kg
      LD 50 dermalLD50 Rat 1170 mg/kg
      Safety Information according to GHS
      Hazard Pictogram(s) Hazard Pictogram(s)
      Hazard Pictogram(s)
      Hazard Pictogram(s)
      Hazard Pictogram(s)
      Hazard Pictogram(s)
      Hazard Statement(s)H340: May cause genetic defects.
      H350: May cause cancer.
      H360FD: May damage fertility. May damage the unborn child.
      H272: May intensify fire; oxidizer.
      H301: Toxic if swallowed.
      H312: Harmful in contact with skin.
      H314: Causes severe skin burns and eye damage.
      H317: May cause an allergic skin reaction.
      H330: Fatal if inhaled.
      H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled.
      H335: May cause respiratory irritation.
      H372: Causes damage to organs through prolonged or repeated exposure.
      H410: Very toxic to aquatic life with long lasting effects.
      Precautionary Statement(s)P201: Obtain special instructions before use.
      P221: Take any precaution to avoid mixing with combustibles, heavy-metal compounds, acids and alkalis.
      P273: Avoid release to the environment.
      P280: Wear protective gloves/ protective clothing/ eye protection/ face protection.
      P301 + P330 + P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
      P302 + P352: IF ON SKIN: Wash with plenty of soap and water.
      P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
      P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
      P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician.
      Signal WordDanger
      Storage class5.1B Oxidizing hazardous materials
      WGKWGK 3 highly hazardous to water
      Inorganic peroxides and oxidants as well as bromine and iodine should be rendered harmless by reduction with acidic sodium thiosulfate solution (Cat. No. 106513); container D or E. Slightly soluble oxidants should be collected separately in container E or I.
      Safety Information
      Hazard Symbols Hazard SymbolsDangerous for the environment
      Hazard SymbolsVery toxic
      Hazard SymbolsOxidising
      Categories of dangercarcinogenic, mutagenic, toxic for reproduction, oxidizing, very toxic, corrosive, sensitizing, dangerous for the environment
      R PhraseR 45-46-60-61-21-25-26-48/23- 8-34-42/43-50/53
      May cause cancer.May cause heritable genetic damage.May impair fertility.May cause harm to the unborn child.Also harmful in contact with skin.Also toxic if swallowed.Also very toxic by inhalation.Also toxic: danger of serious damage to health by prolonged exposure through inhalation.Contact with combustible material may cause fire.Causes burns.May cause sensitisation by inhalation and skin contact.Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
      S PhraseS 53-45-60-61
      Avoid exposure - obtain special instructions before use.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).This material and its container must be disposed of as hazardous waste.Avoid release to the environment. Refer to special instructions/ Safety data sheets.
      Product Usage Statements
      Storage and Shipping Information
      StorageStore at +15°C to +25°C.
      Packaging Information
      Transport Information
      Declaration (railroad and road) ADR, RIDUN 3086 , 6.1 (5.1), II
      Declaration (transport by air) IATA-DGRUN 3086 , 6.1 (5.1), II
      Declaration (transport by sea) IMDG-CodeUN 3086 , 6.1 (5.1), II
      Supplemental Information

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      Analytics and Sample Preparation > Reference Materials > Certipur® Volumetric Standards > for Redox Titration
      Reagents, Chemicals and Labware > Inorganic Reagents > Instrumental Inorganic Analysis > Certipur® Standards, Reference Materials and Buffers > Certipur® Volumetric Standards > for Redox Titration