pH standard－Borax , PH (25 ° C): 9.18 , 1330-43-4

Synonym(s):
Borax;Borax, fused;di-Sodium tetraborate;Sodium tetraborate

CAS NO.：1330-43-4

Empirical Formula: B4Na2O7

Molecular Weight: 201.22

MDL number: MFCD00081185

EINECS: 215-540-4

PRODUCT Properties

• Melting point: 741 °C (lit.)
• Boiling point: 1575°C
• bulk density: 700kg/m3
• Density: 2.367 g/mL at 25 °C (lit.)
• vapor pressure: 7.3 hPa (1200 °C)
• refractive index: 1.501
• Flash point: 1575°C
• storage temp.: Store at +5°C to +30°C.
• solubility: H₂O: 0.1 M at 20 °C, clear, colorless
• form: Solid
• Specific Gravity: 2.367
• color: White
• PH: 9.0-10.5 (25℃, 0.1M in H2O)
• Water Solubility: 26 g/L (20 ºC)
• Sensitive: Hygroscopic
• λmax: λ: 260 nm Amax: ≤0.020; λ: 280 nm Amax: ≤0.015
• Merck: 14,8590
• Exposure limits: ACGIH: TWA 2 mg/m3; STEL 6 mg/m3; NIOSH: TWA 1 mg/m3
• Stability: Stable. Incompatible with powdered metals.
• InChIKey: UQGFMSUEHSUPRD-UHFFFAOYSA-N
• NIST Chemistry Reference: Sodium borate(1330-43-4)
• EPA Substance Registry System: Sodium tetraborate (1330-43-4)

Description and Uses

Refined borax (Na2B4O7) is an additive in laundry products such as soaps and water-softening compounds. Also used for cosmetics, body powders, and the manufacture of paper and leather. Borax is an environmentally safe natural herbicide and insecticide.

Safety

• Symbol(GHS): GHS07,GHS08
• Signal word: Danger
• Hazard statements: H319-H360FD
• Precautionary statements: P202-P264-P280-P305+P351+P338-P308+P313-P337+P313
• Hazard Codes: Xn,Xi,T
• Risk Statements: 62-63-36/38-36/37/38-61-60
• Safety Statements: 36/37-24/25-26-36-23-45-53
• RIDADR: UN 1760 8/PG 2
• OEB: C
• OEL: TWA: 1 mg/m3
• WGK Germany: 1
• RTECS: ED4588000
• F: 34
• TSCA: Yes
• HS Code: 28401100
• Hazardous Substances Data: 1330-43-4(Hazardous Substances Data)