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71687 Sigma

Sodium hydroxide

BioUltra, for luminescence, ≥98.0% (T), pellets

Synonym: ‘Caustic soda’

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Properties

Related Categories Acids & Bases, Bases, Chemical Synthesis, Essential Chemicals, Inorganic Bases,
grade   for luminescence
vapor density   >1 (vs air)
vapor pressure   <18 mmHg ( 20 °C)
  3 mmHg ( 37 °C)
InChI Key   HEMHJVSKTPXQMS-UHFFFAOYSA-M
product line   BioUltra
assay   ≥98.0% (T)
form   pellets
impurities   insoluble matter, passes filter test
  ≤0.0003% total nitrogen (N)
  ≤0.0005% silicon dioxide (SiO2)
  ≤1.0% sodium carbonate (Na2CO3)
mp   318 °C(lit.)
solubility   H2O: 1 M at 20 °C clear, colorless
anion traces   chloride (Cl-): ≤10 mg/kg
  phosphate (PO43-): ≤5 mg/kg
  sulfate (SO42-): ≤5 mg/kg
cation traces   Ag: ≤5 mg/kg
  Al: ≤5 mg/kg
  As: ≤0.1 mg/kg
  Ba: ≤5 mg/kg
  Bi: ≤5 mg/kg
  Ca: ≤10 mg/kg
  Cd: ≤5 mg/kg
  Co: ≤5 mg/kg
  Cr: ≤5 mg/kg
  Cu: ≤5 mg/kg
  Fe: ≤5 mg/kg
  Hg: ≤0.1 mg/kg
  K: ≤200 mg/kg
  Li: ≤5 mg/kg
  Mg: ≤5 mg/kg
  Mn: ≤5 mg/kg
  Mo: ≤5 mg/kg
  Ni: ≤5 mg/kg
  Pb: ≤5 mg/kg
  Sr: ≤5 mg/kg
  Zn: ≤5 mg/kg
λ   1 M in H2O
UV absorption   λ: 260 nm Amax: 0.015
  λ: 280 nm Amax: 0.01
suitability   in accordance for luminescence

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Safety & Documentation

Safety Information

Symbol 
GHS05  GHS05
Signal word 
Danger
Hazard statements 
RIDADR 
UN 1823 8 / PGII
WGK Germany 
1
RTECS 
WB4900000
Protocols & Articles

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