Citric Acid Monohydrate CAS：5949-29-1
High Grade Purity: The product is distinguished by its exceptionally high purity, delivering consistent and reliable performance across diverse applications, from delicate food formulations to sensitive pharmaceutical processes.
Broad-Spectrum Utility: It functions as a multifunctional ingredient suitable for numerous sectors, including food and beverage preservation, pharmaceutical formulations, industrial cleaning agents, and personal care or cosmetic products.
Regulatory Conformity: It complies with major international pharmacopoeia and food standards such as USP, FCC, and BP, ensuring adherence to rigorous quality, safety, and purity requirements.
Customized Packaging Options: We offer flexible packaging solutions from bulk shipments to tailored sizes, all accompanied by Certificates of Analysis (CoA) for complete quality transparency and traceability.
Citric Acid Monohydrate is a high-purity, premium-grade organic acid recognized for its outstanding versatility. It is optimally suited for use across food preservation, pharmaceutical excipients, industrial cleaning, and cosmetic formulations. The product conforms to the requirements of USP, FCC, and BP, and is available in both bulk and customized packaging options. A Certificate of Analysis is supplied with every shipment to ensure complete quality transparency.
Physicochemical Properties
| Property | Description |
|---|---|
| Melting range | 135–152 °C (decomposition) |
| Boiling point | Decomposes upon heating (~175 °C) |
| Density (20 °C) | 1.54 g/cm³ |
| Bulk density | approx. 560 kg/m³ |
| Vapor density (air=1) | 7.26 |
| Vapor pressure (20 °C) | <0.1 hPa |
| Refractive index | 1.493–1.509 |
| Flash point | 100 °C |
| Storage condition | 2–8 °C |
| Solubility | Freely soluble in water (up to ~59 g/100 mL at 20 °C); soluble in ethanol; hygroscopic |
| Physical form | White, odorless, crystalline grit |
| pKa (20 °C) | 3.14 |
| pH (aqueous solutions) | 3.24 (1 mM); 2.62 (10 mM); 2.08 (100 mM) |
| Odor | Odorless |
| Explosive limits | 8% (65 °F) |
| UV absorption (λmax) | λ 260 nm (Amax 0.20); λ 280 nm (Amax 0.10) |
| Partition coefficient (Log P) | −1.64 |
| Merck index | 14,2326 |
| JECFA Number | 218 |
| BRN | 782061 |
| InChIKey | KRKNYBCHXYNGOX-UHFFFAOYSA-N |
| Stability | Hygroscopic; incompatible with bases, strong oxidizers, reducing agents, metal nitrates |
Safety & Regulatory Information
| Property | Description |
|---|---|
| Hazard classification | Xi, C, T |
| Risk phrases | R36/37/38, R41, R34, R35, R60, R61 |
| Safety phrases | S26, S39, S37/39, S24/25, S36/37/39, S45, S36, S53 |
| Transport (ADR) | UN 1789, Class 8, PG III |
| WGK (Water hazard) | 1 |
| Toxicological index (RTECS) | GE7350000 |
| F-Code | 9 |
| TSCA inventory | Listed |
| HS Code | 2918 14 00 |
| Hazardous substance database | CAS 5949-29-1 referenced |
| Acute toxicity (i.p., rodent) | LD50: mouse ~5.0 mmol/kg; rat ~4.6 mmol/kg |
Application Areas of Citric Acid Monohydrate
1. Food & Beverage Industry
Functions as an acidulant, pH regulator, and flavor enhancer in soft drinks, confectionery, jams, and dairy products.
Acts as a natural preservative to extend shelf life and maintain freshness.
Used in effervescent systems (e.g., powdered beverages and tablets) due to its rapid solubility and effervescent reaction with carbonates.
2. Pharmaceuticals & Nutraceuticals
Serves as an excipient in effervescent tablets, granules, and powders, providing acid source for effervescence.
Utilized as a pH adjuster and buffering agent in liquid formulations and syrups.
Acts as a chelating agent to improve stability and bioavailability of certain active ingredients.
3. Cosmetics & Personal Care
Used in skincare and haircare products as a pH adjuster and alpha-hydroxy acid (AHA) for mild exfoliation.
Incorporated into bath bombs and effervescent personal care formulations.
Functions as a sequestering agent to improve product clarity and stability.
4. Industrial & Household Cleaning
Applied in descaling agents and household cleaners to remove limescale, rust, and hard water deposits.
Utilized in industrial water treatment for boiler cleaning and metal finishing.
Serves as an environmentally friendly alternative to harsh acids in biodegradable cleaning formulations.
5. Other Applications
Used in chemical synthesis as a versatile intermediate and chelating agent.
Applied in textile processing and electroplating for metal cleaning and finishing.
Included in animal nutrition as an acidifier to improve feed efficiency and gut health.
