Description
  • Chemical Name
    Sodium Hydroxide
  • Concentration
    49.0–51.0% (w/w)
  • Form
    Liquid
  • Appearance
    Clear
  • Molecular Formula
    NaOH

Description

What is Lab Pro Sodium Hydroxide 50% (w/w)?

Lab Pro Sodium Hydroxide 50% (w/w) is a highly concentrated aqueous solution of sodium hydroxide (NaOH). Supplied as a clear liquid, this strong alkaline solution is designed for analytical and industrial applications requiring precise concentration control and low impurity levels.

Key Features

  • Sodium hydroxide aqueous solution
  • 49.0–51.0% NaOH (w/w)
  • Liquid form
  • High purity with controlled trace impurities
  • Suitable for analytical and regulated testing applications

Applications

  • PFAS testing
  • Analytical chemistry
  • Calibration and standardization procedures
  • Industrial and construction-related chemical processes
  • Alkaline activation and material processing

Standards & Suitability

  • Suitable for DIN 38407-42
  • Suitable for EPA 533
  • Suitable for EPA 8327
  • Suitable for EPA OTM-45

Packaging & Storage

  • Container Size: 1 Gallon / 30 Gallon
  • Physical Form: Liquid
  • Recommended Storage Temperature: 15–25 °C

Safety Notice

Sodium hydroxide solutions are highly alkaline and corrosive. Proper handling, storage, and disposal in accordance with applicable safety regulations are the responsibility of the end user.

Standards and Certifications

  • Lab Pro CofA
  • Lab Pro SDS
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Chemical Information

Chemical Name Sodium hydroxide solution
Linear Formula NaOH
CAS Number 1310-73-2
Molecular Weight 40.00 g/mol
SMILES [OH-].[Na+]
InChI Key HEMHJVSKTPXQMS-UHFFFAOYSA-M

Physical Properties

Appearance Clear liquid
Color APHA ≤10
pH 14 (20 °C, 89 g/L in H₂O)
Density 1.52 g/cm³ at 20 °C
Melting Point 12 °C
Boiling Point 135 °C at 1013 hPa
Vapor Pressure 2 hPa at 20 °C / 3 mmHg at 37 °C

Purity & Impurity Limits

Total Nitrogen (N) ≤0.0003%
Aluminum (Al) ≤0.0005%
Iron (Fe) ≤0.0005%
Heavy Metals (as Pb) ≤0.0005%
Phosphate (PO₄) ≤0.0005%
Silicate (SiO₂) ≤0.005%
Sulfate (SO₄) ≤0.005%
Chloride (Cl) ≤0.01%
Potassium (K) ≤0.01%


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