Sodium Hydroxide 30%

Sodium Hydroxide 30%

Name: Sodium Hydroxide 30%
Chemical formula: NaOH
Molecular weight: 40
Appearance: Colorless and transparent liquid
CAS NO.: 1310-73-2
UN NO.: 1823
DG Class: 8
Sodium Hydroxide 30% is an aqueous solution of sodium hydroxide (NaOH), commonly used in a variety of industrial applications due to its highly alkaline nature and strong reactivity. It's a concentrated form of sodium hydroxide, making it effective for chemical processes, cleaning, water treatment, and more.
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Description
Technical Parameters

Key Properties

 

  • Chemical Name: Sodium Hydroxide (NaOH)
  • Concentration: 30% solution by weight
  • Appearance: Colorless to slightly cloudy liquid
  • Density: ~1.3 g/cm³
  • Boiling Point: 1388°C (for solid NaOH; boiling point varies with concentration)
  • Solubility: Very soluble in water, exothermic dissolution (releases heat)
  • pH: Strongly alkaline (~14 for concentrated solutions)
  • Corrosivity: Highly corrosive to metals, skin, and mucous membranes

 

Main Functions & Applications

 

1. Chemical Manufacturing

Sodium Hydroxide 30% is widely used in the chemical industry for various synthesis and neutralization processes:

Saponification:

Used to make soap by reacting with fats or oils in a process called saponification, where sodium hydroxide breaks down triglycerides to produce soap and glycerol.

Acid Neutralization:

It neutralizes acids in chemical reactions, commonly used in acid-base reactions, to achieve the desired chemical products.

Chemical Synthesis:

Sodium hydroxide is used in hydrolysis, esterification, and other important reactions in the manufacture of detergents, pharmaceuticals, textiles, and fertilizers.

2. Water Treatment

In water treatment, sodium hydroxide 30% is utilized to control pH and remove hardness:

pH Adjustment:

Sodium hydroxide is used to raise the pH of acidic water or wastewater, making it safer for discharge or further treatment.

Water Softening:

It is used in water softening processes to precipitate calcium and magnesium ions, which contribute to water hardness. This makes the water more suitable for industrial and domestic use.

Heavy Metal Precipitation:

Sodium hydroxide is used to remove heavy metals from wastewater by precipitating metal hydroxides, which can be easily removed from the water.

3. Cleaning and Degreasing

Sodium Hydroxide 30% is widely used as a cleaning agent:

Industrial Degreasing:

Used to remove grease, oil, fat, and organic residues from machinery, industrial equipment, and surfaces in sectors like automotive, food processing, and metallurgy.

Drain Cleaner:

It is a powerful drain cleaner, breaking down organic blockages like hair, grease, and soap scum in plumbing systems.

Cleaning Metals:

Used in pickling and cleaning metal surfaces, especially stainless steel, to remove oxides and contaminantsbefore further processing or finishing.

4. Petrochemical and Oil Refining

Oil and Gas Refining:

Sodium hydroxide is used in the desulfurization of natural gas and the refining of petroleum to remove sulfur compounds and other contaminants from crude oil.

Biodiesel Production:

It is used in biodiesel production to transesterify vegetable oils or animal fats into biodiesel, facilitating the conversion of triglycerides into fatty acid methyl esters (FAME).

5. Food Industry

Processing Olives:

Sodium hydroxide is used in the processing of olives, particularly for de-bittering them, which helps in making them more palatable.

Pretzel Production:

Used in the preparation of pretzel dough, giving pretzels their characteristic color, texture, and taste by creating an alkaline environment for baking.

6. Pharmaceuticals and Healthcare

pH Control:

Sodium hydroxide 30% is used to adjust pH in the production of pharmaceuticals, injectables, and other medical formulations.

Chemical Synthesis in Pharmaceuticals:

Used as a base in chemical reactions for manufacturing active pharmaceutical ingredients (APIs) and other medicinal compounds.

 

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Specs

 

ITEM

STANDARD

NaOH %

≥30.0

Na2CO3 %

≤0.5

Fe2O3 %

≤0.001

NaCl %

≤0.03

Density (20℃)

1.326-1.330

Heavy metal (Pb) content

≤0.0005

Non-volatile matter content

≤0.05

 

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