Product Introduction
Sulfuric acid is an inorganic compound with the chemical formula H2SO4. It is the most important oxygen-containing acid of sulfur. Pure sulfuric acid is a colorless oily liquid that crystallizes at 10.36°C. It is usually prepared by tower method and contact method using its various concentrations of aqueous solution. Concentrated sulfuric acid with a mass fraction of 98.3% has a boiling point of 338°C and a relative density of 1.84.
Chemical reagent sulfuric acid, also known as high-purity sulfuric acid, is mainly used in pharmaceutical production and configuration. Chemical reagent sulfuric acid is used for Laboratory analysis, aerospace, Chemical reagent sulfuric acid for Pharmaceutical intermediates and other high-precision fields. At present, the market space and application fields are getting wider and wider. Our company adopts the domestic leading secondary distillation and ultra-pure absorption process, with the production of analytical pure, superior pure and electronic grade sulfuric acid as the main products and main direction, focusing on R&D innovation and investment, year-round production to ensure market demand, and thoughtful and meticulous after-sales service.
Purity Grade of Sulfuric Acid
As an important chemical reagent, sulfuric acid has many different purity grades.
• AR level Chemical reagent sulfuric acid: AR grade stands for "Analytical Reagent", which is a purity specification of chemical reagents, usually used for industrial analysis and chemical experiments. AR grade sulfuric acid has higher purity and lower interfering impurities, and is suitable for experiments with higher precision requirements.
• CP level Chemical reagent sulfuric acid: CP grade stands for "Chemically Pure", which is another common purity grade of chemical reagents. The purity of CP grade sulfuric acid is slightly lower than that of AR grade, but it is still suitable for most chemical experiments and synthetic preparations.
• 92.5% Chemical reagent sulfuric acid: This sulfuric acid has a purity of 92.5%, which belongs to industrial grade or laboratory grade sulfuric acid, and is usually used in general chemical experiments or industrial production.
• 98% Chemical reagent sulfuric acid: 98% sulfuric acid usually refers to concentrated sulfuric acid, which has a very high purity, close to analytical grade or superior grade purity, and is widely used in the chemical industry and laboratories.
Application
• Properties and Functions of Sulfuric Acid
Sulfuric acid is a strong inorganic acid that reacts with most metals. Highly concentrated sulfuric acid has strong water-absorbing properties and can be used as a dehydrating agent to carbonize carbohydrate-containing materials such as wood, paper, cotton, and linen fabrics, biological skins, and flesh.
When mixed with water, it releases a large amount of heat. Due to its strong corrosiveness and oxidizing nature, it must be handled with caution.
• Industrial Applications
Sulfuric acid is an important industrial raw material widely used to manufacture fertilizers, pharmaceuticals, explosives, pigments, detergents, batteries, and more. It is also extensively applied in industries such as oil purification, metal smelting, and dyeing.
• Chemical Reagent Grade Sulfuric Acid
Chemical reagent sulfuric acid has high purity with almost no impurities and is mainly used in chemical experiments and analysis. It serves as a dehydrating agent and sulfonating agent in organic synthesis.
Additionally, reagent-grade sulfuric acid plays a significant role in metal pickling, preparation of chemical reagents, catalysts, dehydrating agents, and cleaning of glassware.
Product Parameters
|
Index requirements for chemical reagent sulfuric acid |
|||
|
Index |
Superior purity |
Analytical purity |
Chemical purity |
|
Content (H2SO4), ω/% |
95～98 |
95～98 |
95～98 |
|
Colour, Heshen unit |
≤10 |
≤10 |
≤15 |
|
Ignition residue (calculated as sulfate), ω/% |
≤0.0005 |
≤0.001 |
≤0.005 |
|
(Cl), ω/% |
≤0.00002 |
≤0.00003 |
≤0.00005 |
|
(NO3), ω/% |
≤0.00002 |
≤0.00005 |
≤0.0005 |
|
(NH4), ω/% |
≤0.0001 |
≤0.0002 |
≤0.001 |
|
(Fe), ω/% |
≤0.00002 |
≤0.00005 |
≤0.0001 |
|
(Cu), ω/% |
≤0.00001 |
≤0.00001 |
≤0.0001 |
|
(As), ω/% |
≤0.000001 |
≤0.000003 |
≤0.000005 |
|
(Pb), ω/% |
≤0.00001 |
≤0.00001 |
≤0.0001 |
|
Reduced potassium permanganate substances (calculated as SO2), ω/% |
≤0.0002 |
≤0.0005 |
≤0.001 |
Preparation method
The preparation method of chemical reagent sulfuric acid mainly includes the following steps:
1. Evaporation: Evaporate sulfur trioxide of fuming sulfuric acid through high temperature.
2. Absorption: Absorb the evaporated sulfur trioxide gas through an absorption tower to obtain high-concentration sulfuric acid.
3. Mixing and dilution: Add high-concentration sulfuric acid to high-purity water for mixing and dilution to obtain a chemical reagent sulfuric acid product that meets the standards.
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