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101964 di-Sodium tetraborate decahydrate

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Key Spec Table

CAS #EC NumberHill FormulaChemical FormulaMolar Mass
1303-96-4215-540-4B₄Na₂O₇*10H₂ONa₂B₄O₇ * 10 H₂O381.37 g/mol

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      Glass bottle 25 g
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      Catalogue Number101964
      SynonymsBorax, Sodium biborate decahydrate, Sodium borate decahydrate
      Descriptiondi-Sodium tetraborate decahydrate
      Product Information
      CAS number1303-96-4
      EC index number005-011-01-1
      EC number215-540-4
      Hill FormulaB₄Na₂O₇*10H₂O
      Chemical formulaNa₂B₄O₇ * 10 H₂O
      Molar Mass381.37 g/mol
      HS Code2840 19 90
      Quality LevelMQ300
      Applicationdi-Sodium tetraborate decahydrate certified secondary standard reference material for pH measurement; directly traceable to primary SRM from NIST/PTB pH(S)=9.18₀ (25°C) Certipur®. CAS 1303-96-4.
      Biological Information
      Physicochemical Information
      Density1.730 g/cm3
      Melting Point75 °C Elimination of water of crystallisation
      pH value9.0 - 9.5 (38.1 g/l, H₂O, 25 °C)
      Vapor pressure0.213 hPa (20 °C)
      Bulk density750 kg/m3
      Solubility49.74 g/l
      Materials Information
      Toxicological Information
      LD 50 oralLD50 Rat 2660 mg/kg
      LD 50 dermalLD50 Rabbit > 2000 mg/kg
      Safety Information according to GHS
      Hazard Pictogram(s) Hazard Pictogram(s)
      Hazard Pictogram(s)
      Hazard Statement(s)H319: Causes serious eye irritation.
      H360FD: May damage fertility. May damage the unborn child.
      Precautionary Statement(s)P201: Obtain special instructions before use.
      P202: Do not handle until all safety precautions have been read and understood.
      P264: Wash skin thoroughly after handling.
      P280: Wear protective gloves/ protective clothing/ eye protection/ face protection/ hearing protection.
      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 + P313: IF exposed or concerned: Get medical advice/ attention.
      Signal WordDanger
      Storage class6.1D Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
      WGKWGK 1 slightly hazardous to water
      Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.
      Safety Information
      Categories of dangertoxic for reproduction
      Product Usage Statements
      Storage and Shipping Information
      StorageStore at +15°C to +25°C.
      Packaging Information
      Transport Information
      Supplemental Information
      pH-value (25 °C)9.180 - 9.186
      Identitypasses test


      di-Sodium tetraborate decahydrate SDS


      Safety Data Sheet (SDS) 

      di-Sodium tetraborate decahydrate Certificates of Analysis

      Product Number PackagingSpecificationLot Number
      1.01964.0025 Glass bottlePDF Specification Document


      Certificate ISO 17025 accreditation (English)
      Certificate ISO 17025 accreditation - annex
      DAKKS - Accreditation ISO Guide 34 - Production of conductivity standard solutions, element standard solutions, pH-reference solids, pH-reference solutions, water standards and titirimetric standards
      DAkkS - Annex to Accreditation Certificate D-K- 15185--01-00 - DIN EN ISO/IEC 17025:2018 - Chemical and medical quantities - Chemical analysis and reference materials - pH value - Elektrolytic conductivity - Mass fraction of elements in standard solutions - Amount of substance concentration of elements in standard solutions - Mass fraction of titrimetric standards - Mass fraction in water and titrimetric standards - Amount-of-substance concentration in volumetric solutions


      pH Calibration is Now so Easy

      Technical Info

      Certification Report - Certified Reference Material - Aquastar® Karl Fischer Standards (Merck)
      Certification Report - Certified Reference Material - Certipur® Secondary buffer substances (Merck)

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