Sodium Hydroxide (Caustic Soda / Lye)

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Sodium Hydroxide 50% Membrane Grade (Caustic Soda, Lye)

50%Membrane Grade

Available sizes: 1 Quart–330 Gallon

From $39.00
Sodium Hydroxide 50% Solution ACS Grade

50%ACS Reagent Grade

Available sizes: 1 Quart–330 Gallon

From $22.09
Sodium Hydroxide Flakes

100%Technical Grade

Available sizes: 2 lbs.–55 Lbs.

From $16.54
Sodium Hydroxide Flakes ACS Grade

ACS Reagent Grade

Available sizes: 2 lbs.–55 Lbs.

From $17.95
Sodium Hydroxide 25%

25%Technical Grade

Available sizes: 1 Quart–330 Gallon

From $16.00
Sodium Hydroxide 25% ACS Grade

25%ACS Reagent Grade

Available sizes: 1 Quart–330 Gallon

From $21.20
Sodium Hydroxide 10% Technical Grade

10%Technical Grade

Available sizes: 1 Quart–330 Gallon

From $22.00
Sodium Hydroxide 10% ACS Grade

10%ACS Reagent Grade

Available sizes: 1 Quart–330 Gallon

From $24.65
Sodium Hydroxide 5% ACS Grade

5%ACS Reagent Grade

Available sizes: 1 Quart–330 Gallon

From $14.44
Sodium Hydroxide 30% Technical Grade

30%Technical Grade

Available sizes: 1 Quart–330 Gallon

From $15.09
Sodium Hydroxide 15% ACS Grade

15%ACS Reagent Grade

Available sizes: 1 Quart–330 Gallon

From $25.75
Sodium Hydroxide 5% Technical Grade

5%Technical Grade

Available sizes: 1 Quart–330 Gallon

From $14.00
Sodium Hydroxide 30% ACS Grade

30%ACS Reagent Grade

Available sizes: 1 Quart–330 Gallon

From $16.91
Sodium Hydroxide 20% ACS Grade

20%ACS Reagent Grade

Available sizes: 1 Quart–330 Gallon

From $15.92
Sodium Hydroxide 20% Technical Grade

20%Technical Grade

Available sizes: 1 Quart–330 Gallon

From $14.21
Sodium Hydroxide 15% Technical Grade

15%Technical Grade

Available sizes: 1 Quart–330 Gallon

From $23.00

About Sodium Hydroxide (Caustic Soda / Lye)

Buy sodium hydroxide (NaOH, CAS 1310-73-2), also called caustic soda or lye, from Alliance Chemical in flakes and aqueous solutions. This collection supports pH adjustment, alkaline cleaning, drain and process maintenance, chemical manufacturing, and laboratory reagent work.

Products In This Collection

This collection includes sodium hydroxide flakes, 5%-50% sodium hydroxide solutions, Technical Grade, ACS Grade, and membrane-grade caustic soda options. Choose product form and concentration based on handling requirements, dilution needs, and process specification.

Common Applications

  • pH adjustment and neutralization: Caustic soda is used to raise pH and neutralize acidic streams in water treatment and industrial processes.
  • Alkaline cleaning: Sodium hydroxide removes fats, oils, organic soils, and process residues in compatible cleaning systems.
  • Soap and chemical manufacturing: NaOH is a core feedstock for saponification, detergents, and a wide range of chemical reactions.
  • Precision cleaning and etching: High-purity caustic solutions support specialized optical, glass, and component cleaning workflows.

Grade & Selection Notes

Choose flakes when dry storage and custom dilution are needed. Choose prepared solutions when you need faster setup, controlled concentration, or reduced solid-handling risk. Use ACS Grade for reagent work and Technical or membrane grade for industrial production.

Safety & Handling

Sodium hydroxide is highly corrosive, and dilution releases heat. Add caustic slowly to water with mixing and cooling as needed. Wear chemical-resistant gloves, face and eye protection, and use compatible containers. Review the Safety Data Sheets before use and follow your site-specific handling procedure.

Why Buy From Alliance Chemical

Most in-stock sodium hydroxide orders ship in 1-2 business days. SDS and lot-specific COA support are available. As a bulk sodium hydroxide distributor, Alliance Chemical supplies wholesale caustic soda in beads, flake, and solution volumes alongside single units, with volume pricing on request.

Related: Bases & Caustics, Hydroxides, Potassium Hydroxide, Hydrochloric Acid.

Frequently Asked Questions

Is sodium hydroxide the same as lye?
Yes. Lye is a common name for sodium hydroxide, especially in soapmaking and cleaning contexts.
Should I buy flakes or solution?
Choose flakes for dry storage and custom dilution. Choose solution when you want a ready-to-use concentration and less solid handling.
What concentrations are available?
Alliance Chemical carries multiple sodium hydroxide solution strengths, including dilute products and stronger caustic soda solutions up to 50%, plus flakes.
Is sodium hydroxide dangerous to dilute?
Dilution is exothermic and can generate heat. Add caustic slowly to water, never into an incompatible material, and use proper PPE.
What grade of NaOH should I choose?
Use ACS Grade for reagent work, Technical Grade for general industrial use, and membrane-grade caustic when your specification calls for it.