Citric acid monohydrate

Also known as: Citric acid hydrate, Citric acid monohydrate, Monohydrate citric acid, 2-Hydroxy-1,2,3-propanetricarboxylic acid hydrate, 2-Hydroxypropane-1,2,3-tricarboxylic acid hydrate, Citric acid monohydrate powder

Citric acid monohydrate (CAS 5949-29-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H10O8 and a molecular weight of 210.139 g/mol. Key properties include a melting point of 135-152 ºC, a boiling point of 56 °C760 mm Hg(lit.), a density of 1.54 and a flash point of 173.9 ºC. It is classified under GHS with signal word Warning and hazard statements H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5949-29-1
Jingsj CID: J-36014-5
Molecular Formula: C₆H₁₀O₈
Molecular Weight: 210.139 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	135-152 ºC
Boiling Point	56 °C760 mm Hg(lit.)
Density	1.54
Flash Point	173.9 ºC
Exact Mass	210.037567
PSA	141.36000
Additional Property	2 (vs air)
Vapor Pressure	184 mm Hg ( 20 °C)
Refractive Index	n20/D 1.359(lit.)
Additional Property	1630 g/L (20 ºC)

GHS Safety & Compliance

IrritantSignal word: Warning

H319 — Causes serious eye irritation

Activity & Biological Data

Target	Human Endogenous Metabolite
Additional Information	[1]. Chen X, et al. Study on injury effect of food additive citric acid on liver tissue in mice. Cytotechnology. 2014 Mar;66(2):275-82. [2]. Chen X, Lv Q, Liu Y, Deng W. Effects of the food additive, citric acid, on kidney cells of mice. Biotech Histochem. 2015 Jan;90(1):38-44. [3]. Ying TH, et al. Citric acid induces cell-cycle arrest and apoptosis of human immortalized keratinocyte cell line (HaCaT) via caspase- and mitochondrial-dependent signaling pathways. Anticancer Res. 2013 Oct;33(10):4411-20.

Target

Human Endogenous Metabolite

Additional Information

[1]. Chen X, et al. Study on injury effect of food additive citric acid on liver tissue in mice. Cytotechnology. 2014 Mar;66(2):275-82. [2]. Chen X, Lv Q, Liu Y, Deng W. Effects of the food additive, citric acid, on kidney cells of mice. Biotech Histochem. 2015 Jan;90(1):38-44. [3]. Ying TH, et al. Citric acid induces cell-cycle arrest and apoptosis of human immortalized keratinocyte cell line (HaCaT) via caspase- and mitochondrial-dependent signaling pathways. Anticancer Res. 2013 Oct;33(10):4411-20.

Customs & Trade Information

HS Code	2918199090
Summary	2918199090 other carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Citric acid monohydrate?

The CAS number of Citric acid monohydrate is 5949-29-1.

What are the molecular formula and molecular weight of Citric acid monohydrate?

Citric acid monohydrate has molecular formula C6H10O8 and molecular weight 210.139 g/mol.

Is Citric acid monohydrate hazardous?

Citric acid monohydrate has GHS signal word Warning and hazard statements H319 — Causes serious eye irritation.

What are the upstream and downstream products of Citric acid monohydrate?

For Citric acid monohydrate, Downstream Products: 6-Methoxyquinoline-4-carbaldehyde, Protected meropenem.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Citric acid monohydrate (CAS 5949-29-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-36014-5 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.