无水柠檬酸

Description

Citric Acid, anhydrous · CAS 79586-22-4 · C6H8O7. UNII XF417D3PSL. Melting Point: 153; Melting Point: 153 °C; Flash Point: 100 °C.

Identification

CAS Registry Number	79586-22-4
PubChem CID	311
Molecular formula	C6H8O7
IUPAC name	2-hydroxypropane-1,2,3-tricarboxylic acid
UNII (FDA)	XF417D3PSL
FEMA number	2306
JECFA number	218

Computed Descriptors

Molecular Weight	192.12
XLogP3	-1.7
Hydrogen Bond Donor Count	4
Hydrogen Bond Acceptor Count	7
Rotatable Bond Count	5
Exact Mass	192.02700259
Monoisotopic Mass	192.02700259
Topological Polar Surface Area	132
Heavy Atom Count	13
Formal Charge	0

Physical & Chemical Properties

Melting Point	153
Melting Point	153 °C
Flash Point	100 °C
Solubility	592000
Solubility	In water, 3.83X10+5 mg/L at 25 °C
Solubility	592.0 mg/mL
Density	1.665 g/cu cm at 20 °C
LogP	-1.64
LogP	log Kow = -1.64
LogP	-1.7

Physical description & handling notes

• Citric acid appears as colorless, odorless crystals with an acid taste. Denser than water. (USCG, 1999)
• Other Solid; Dry Powder; CBI; Large Crystals; Dry Powder; Large Crystals; Liquid; Other Solid; Dry Powder; Liquid; Liquid; Large Crystals; Liquid
• Citric acid is a white or colourless, odourless, crystalline solid, having a strongly acid taste. The monohydrate effloresces in dry air
• Colorless and odorless crystals , it has an acid taste; [CAMEO] Deliquescent; [CHEMINFO]
• Solid
• COLOURLESS CRYSTALS.

Regulatory Status

Regulatory & Food Contact

FDA Substance added to food: ANTIMICROBIAL AGENT, ANTIOXIDANT, ENZYME, FLAVOR ENHANCER, FLAVORING AGENT OR AD FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS FLAVOURING_AGENTFood Additives -> ACID; ANTIOXIDANT_SYNERGIS: Flavouring Agent Flavoring Agents Citric acid is produced from lemon or pineapple juice, by fermentation of carbohydrate solutions or other suit ANTIMICROBIAL AGENT, ANTIOXIDANT, ENZYME, FLAVOR ENHANCER, FLAVORING AGENT OR ADJUVANT, LEAVENING AGENT, PH CO

GHS notification summary

8.2% (359 / 4373)

GHS Hazard Classification

GHS notification summary	8.2% (359 / 4373)
Reported hazard statements	H319, H335, H315

Documented Uses

• A Compound from citrus fruits that is an intermediate in the tricarboxylic acid (Krebs) cycle. It is used as an acidifying agent in foods, beverages, and pharmaceuticals. Citrate chelates calcium ions and prevents blood clotting. It is also used as an anticoagulant for stored whole blood and red cells and also for blood specimens. (Dorland, 28th ed) [ChemIDplus]
• Active ingredient in products registered for residential and commercial use as disinfectants, sanitizers and fungicides ... products are used to kill odor-causing bacteria, mildew, pathogenic fungi, certain bacteria and some viruses. Citric acid products are used in bathrooms and in/on dairy and food processing equipment.
• Anticoagulent, generally in solution with glucose, to prevent clotting of blood intended for transfusion
• For more Uses (Complete) data for CITRIC ACID (19 total), please visit the HSDB record page.
• Use (kg; approx.) in Germany (2009): >100000
• Consumption (g per capita; approx.) in Germany (2009): 1.22

Synonyms

citric acid; 77-92-9; 2-hydroxypropane-1,2,3-tricarboxylic acid; Citric acid, anhydrous; Aciletten; Anhydrous citric acid; Citro; Citretten; Citric acid anhydrous; Chemfill; Hydrocerol A; 1,2,3-Propanetricarboxylic acid, 2-hydroxy-; 2-hydroxy-1,2,3-propanetricarboxylic acid; Kyselina citronova; 2-Hydroxytricarballylic acid; beta-Hydroxytricarballylic acid

Frequently Asked Questions

What are the CAS number and molecular formula of Citric Acid, anhydrous?

CAS 79586-22-4; molecular formula C6H8O7; molecular weight — g/mol.

What other names is Citric Acid, anhydrous known by?

citric acid, 77-92-9, 2-hydroxypropane-1,2,3-tricarboxylic acid, Citric acid, anhydrous, Aciletten, Anhydrous citric acid.

What is the regulatory status of Citric Acid, anhydrous?

Documented regulatory listings: FDA Substance added to food: ANTIMICROBIAL AGENT, ANTIOXIDANT, ENZYME, FLAVOR ENHANCER, FLAVORING AGENT OR AD; FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS; FLAVOURING_AGENTFood Additives -> ACID; ANTIOXIDANT_SYNERGIS: Flavouring Agent.

Is Citric Acid, anhydrous classified as hazardous?

8.2% of GHS notifications report no hazard classification (359 of 4373).

What are the key physical properties of Citric Acid, anhydrous?

Melting Point: 153; Melting Point: 153 °C; Flash Point: 100 °C; Solubility: 592000.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.