Citric Acid

Chemical name:Citric Acid
Synonymous:2-Hydroxy-1,2,3-Propanetricarboxylic Acid
Sales Models:Wholesale
Reference FOB Price:US $500-1000 / Ton
Min Order:22mt
Port:Tianjin, China
Samples:US $ 100/Piece
Payment Terms:L/C, T/T, Paypal

· Model:CAA

Brand:RAWCHEM

· Code:22023

· CAS No.:77-92-9

· Molecular weight:192.122

· Molecular formula:C6H8O7

· EINECS:201-069-1

· H.S.Code:2918140000

· Melting point:153 ºC

· Density:1.542 g/cm3

· Shelf life:24 months

Product Parameters

Appearance: colorless semi-transparent crystalline powder.

Physical and Chemical data:

Melting Point	Density (g/m³)	Critical point of crystallization
153ºC	1.542	36.6ºC (to become CAM)

Other Related indexes:

EINECS	RTECS	PubChem	MDL	BRN
201-069-1	GE7350000	24864122	MFCD00011669	782061

Solubility: Soluble in water, alcohol and ether, the solubility in water is as below:

Temperature (ºC)	10	20	30	40	50	60	70	80	90	100
Solubility by (g)	54	59.2	64.3	68.6	70.9	73.5	76.2	78.8	81.4	84

Main types:
According to the particle size, there are mainly 2 types:
1. 10~40 mesh;
2. 30~100 mesh.

Features:
1. Big solubility in water, alcohol and ether;
2. Among all the sour agents, CAA's acidity is the most accepted by human;
3. Water softening ability, it can combine the Ca2+ and other metal ions (except for alkali metal), and for the compounds (like Calcium citrate), their solubility in cold water is higher than hot water, which is a big advantage in detergent industry;
4. pH buffering ability;
5. Low toxic.

Application

1. Food industry as acidity modifier;
2. Detergent industry as water softener and auxiliary;
3. Cosmetics;
4. Chemical industry and etc.

Function and application in food industry:
1. As sour agent in beverages, can, candy, and etc;
2. As sucrose conversion agent in sugar making;
3. As color fixative for fresh vegetables and fruits ( 1% CAA + 1~2% sodium chloride solution);
4. As pH buffering agent and modifiers in various mass production food;
5. As antioxidant in the mass processing of many food;
6. As modifier when combined with sodium bicarbonate in wheaten food;
7. As flavor and smell-remover in salted food and cans;
8. Slower the decline speed of Vc concentration in orange juice;

Function in detergent industry:
Replacing STPP to soften water with the following advantages:
1. Environmental friendly with good bi-degradation;
2. Better safety in dish washing and other related detergents which can enter human organs easily;
3. Good chelating ability, not only to Ca²⁺, Mg²⁺ but also to other non-alkali metal ions, and the solubility of these chelated salts in cold water is bigger than hot water;
4. Better solubility than STPP, Zeolite;
5. Good pH buffering ability;
6. Rust inhibiting ability which is good for the related equipments and pipes;
7. Thickening agent in liquid detergent system.

Important Notice

1. Citric Acid anhydrous is easily get caked when exposed in air;
2. Relationship / difference between Citric Acid Anhydrous and Citric Acid Monohydrate:
The only difference is there is a crystal water molecule in CAM, there is almost no difference in chemical features and applications.
3. We normally list 2 years as the shelf life in our COA, the real shelf life can be slightly longer than 2 years if it's stocked in good condition (bags are sealed enough, away from direct sun-light, moisture and other incompatible chemical materials).