Anhydrous citric acid is an acidic compound that does not contain crystal water, with a chemical formula of C₆H₈O₇, a molecular weight of 192.13, and a CAS number of 5949-29-1. Its non-hygroscopicity, high solubility, and strong acid effect make it an irreplaceable core raw material in the fields of food, medicine, industry, and environmental protection.

Packaging & Transportation

【Anhydrous Citric Acid – High-Purity Multi-Scenario Acid Control Expert】

Core Attributes & Performance Advantages

▸ Chemical Composition: C₆H₈O₇ (anhydrous), CAS 5949-29-1, white crystalline powder, non-hygroscopic, easy to store.
▸ Strong Acidity: pH 2.2–2.8 (15% higher acidity than monohydrate citric acid), rapid penetration for superior cleaning and preservation.
▸ Fast Solubility: Dissolves in cold water within 30 seconds, stable under high temperatures, ideal for spray drying and sterilization.
▸ Chelating Power: 20% higher metal ion chelation efficiency, extending equipment lifespan (e.g., boilers, pipelines).
▸ Safety: FDA/EFSA certified, heavy metals <0.1ppm, biodegradability >98%.

vs. Monohydrate Citric Acid & Sodium Citrate – Key Differences

Comparison Criteria	Anhydrous Citric Acid	Monohydrate Citric Acid	Sodium Citrate
Form	No crystalline water, higher purity	Contains 1 water molecule	Sodium salt, pH buffering
Solubility	Cold water solubility in 30 sec	Requires 2 minutes heating	Needs heating for dissolution
Thermal Stability	Stable above 150°C	Decomposes at 120°C	Heat-resistant but hygroscopic
Applications	High-temperature processes, pharma, semiconductor cleaning	Food & beverages, general cleaning	Water treatment, pH adjustment
Chelation Efficiency	20% higher metal ion removal	Standard chelation	Relies on sodium synergy

Core Application Scenarios & Customer Value
1. Industrial Manufacturing

Semiconductor Cleaning:

Scenario: Wafer deionized water system descaling, photoresist removal.

Value: Non-residue property ensures ionic residue <1ppb, increasing chip yield by 18%; withstands high temperatures (150°C), compatible with lithography processes.

Metal Pickling & Corrosion Prevention:

Scenario: Stainless steel/aluminum pipeline derusting and surface passivation.

Value: 1:8 ratio achieves 95% derusting efficiency, non-corrosive; replaces hydrochloric acid, reducing safety risks and environmental costs.

Circulating Water Treatment:

Scenario: Scale inhibition in power plant/chemical plant cooling systems.

Value: Enhanced calcium/magnesium ion chelation capacity (+20%), scale inhibition rate >90%, reducing downtime maintenance by 50%.

2. Pharmaceuticals & Healthcare

Drug Formulations:

Scenario: Sustained-release tablet matrix, injection pH adjuster.

Value: Fully dissolves in 3 minutes (vs. 5 minutes for monohydrate), high stability, USP-NF certified, sterile production.

Nutritional Supplements:

Scenario: Calcium/phosphorus absorption enhancer, vitamin C composite formulas.

Value: Natural acidic environment boosts active ingredient stability, enhancing bioavailability by 15%.

3. Food & Personal Care

Baking & Meat Processing:

Scenario: Cake leavening agent (replaces baking powder), meat tenderizer.

Value: Increases cake volume by 20%, reduces muscle fiber shear force by 30%, yielding tenderer meat.

Cleaning & Personal Care:

Scenario: Laundry detergent booster, hand sanitizer pH balance.

Value: Enhances cleaning efficiency by 40% in cold water, saving 15% hot water usage; synergizes with benzalkonium chloride for gentle sterilization.

4. Environmental Protection & Agriculture

Flue Gas Desulfurization:

Scenario: SO₂ treatment in coal-fired power plants.

Value: SO₂ absorption rate >92%, recyclable gypsum byproduct reduces environmental costs by 20%.

Soil Remediation & Fertilizers:

Scenario: Acidic soil neutralization, foliar fertilizer micronutrient chelation.

Value: Adjusts pH to 6.5–7.0, mitigates aluminum toxicity; enhances crop calcium/magnesium uptake, boosting yields by 12%–15%.

5. Emerging Fields

E-cigarette Liquids:

Scenario: pH adjustment and flavor optimization in e-liquids.

Value: Replaces sodium citrate, delivers natural tartness, improving user acceptance.

Lithium Battery Electrolytes: