一水柠檬酸

Description

Citric acid monohydrate · CAS 5949-29-1 · C6H8O7.H2O. UNII 2968PHW8QP. Melting Point: 135 °C; Density: 1.5 g/cm³; LogP: -1.72.

Identification

CAS Registry Number	5949-29-1
PubChem CID	22230
Molecular formula	C6H8O7.H2O
IUPAC name	2-hydroxypropane-1,2,3-tricarboxylic acid;hydrate
UNII (FDA)	2968PHW8QP

Computed Descriptors

Molecular Weight	210.14
Hydrogen Bond Donor Count	5
Hydrogen Bond Acceptor Count	8
Rotatable Bond Count	5
Exact Mass	210.03756727
Monoisotopic Mass	210.03756727
Topological Polar Surface Area	133
Heavy Atom Count	14
Formal Charge	0
Complexity	227

Physical & Chemical Properties

Melting Point	135 °C
Density	1.5 g/cm³
LogP	-1.72
Autoignition Temperature	1010 °C
Decomposition	175 °C

Physical description & handling notes

• Dry Powder
• White solid; Slightly deliquescent; [ICSC] White crystals; [Sigma-Aldrich MSDS]
• SLIGHTLY DELIQUESCENT WHITE CRYSTALS.
• Solubility in water, g/100ml at 20 °C: 59.2
• Dust explosion possible if in powder or granular form, mixed with air.

Regulatory Status

GHS notification summary	1.6% (18 / 1100)

GHS Hazard Classification

GHS notification summary	1.6% (18 / 1100)
Reported hazard statements	H315 (14.2%), H319 (93.2%), H335 (45.3%)

Documented Uses

• Used as an anticoagulant in blood banks, acidulant (beverages, confectionery, cheese, effervescent salts, pharmaceutical syrups, elixirs, effervescent powders, and tablets), antioxidant, sequestering agent to remove trace metals, and mordant to brighten colors; Also used to make alkyd resins and in electroplating, special inks, and analytical chemistry; [Merck Index]
• Electroplating [Category: Plate]
• Textiles (Printing, Dyeing, or Finishing) [Category: Industry]
• EPA Safer Chemical Functional Use Classes -> Processing Aids and Additives
• Safer Chemical Classes -> Green circle - The chemical has been verified to be of low concern
• Information on 20 consumer products that contain Citric acid monohydrate in the following categories is provided:

Synonyms

Citric acid monohydrate; 5949-29-1; Citric acid hydrate; CITRIC ACID, MONOHYDRATE; 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, monohydrate; citric acid;hydrate; 2968PHW8QP; DTXSID7074668; 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, hydrate (1:1); Acidum citricum monohydrate; Citiric acid; Soothe Chewable; Surface Wipes; Stop Hair; Alphacide Activator; PURILAB

Frequently Asked Questions

What are the CAS number and molecular formula of Citric acid monohydrate?

CAS 5949-29-1; molecular formula C6H8O7.H2O; molecular weight — g/mol.

What other names is Citric acid monohydrate known by?

Citric acid monohydrate, 5949-29-1, Citric acid hydrate, CITRIC ACID, MONOHYDRATE, 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, monohydrate, citric acid;hydrate.

Is Citric acid monohydrate classified as hazardous?

1.6% of GHS notifications report no hazard classification (18 of 1100).

What are the key physical properties of Citric acid monohydrate?

Melting Point: 135 °C; Density: 1.5 g/cm³; LogP: -1.72; Autoignition Temperature: 1010 °C.

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.