MilliporeSigma
All Photos(7)

Documents

791725

Sigma-Aldrich

Citric acid

anhydrous, free-flowing, Redi-Dri, ACS reagent, ≥99.5%

Sign Into View Organizational & Contract Pricing

Synonym(s):
2-Hydroxy-propane-1,2,3-tricarboxylic acid
Linear Formula:
HOC(COOH)(CH2COOH)2
CAS Number:
Molecular Weight:
192.12
Beilstein/REAXYS Number:
782061
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent
anhydrous

Quality Level

product line

Redi-Dri

assay

≥99.5%

form

crystals

quality

free-flowing

expl. lim.

8 %, 65 °F

impurities

Substances carbonizable by hot sulfuric acid, passes test

ign. residue

≤0.02%

pKa 

(1) 3.13, (2) 4.76, (3) 6.4

mp

153-159 °C (lit.)

anion traces

chloride (Cl-): ≤0.001%
oxalate (C2O42-): passes test (limit about 0.003%)
phosphate (PO43-): ≤0.001%
sulfate (SO42-): ≤0.002%

cation traces

Fe: ≤3 ppm
Pb: ≤2 ppm

SMILES string

OC(=O)CC(O)(CC(O)=O)C(O)=O

InChI

1S/C6H8O7/c7-3(8)1-6(13,5(11)12)2-4(9)10/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12)

InChI key

KRKNYBCHXYNGOX-UHFFFAOYSA-N

Looking for similar products? Visit Product Comparison Guide

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item
251275C075927487
vibrant-m

791725

Citric acid

-
vibrant-m

251275

Citric acid

-
vibrant-m

C0759

Citric acid

-
vibrant-m

27487

Citric acid

Premium Grade
assay

≥99.5%

assay

≥99.5%

assay

99%

assay

≥99.5% (T)

mp

153-159 °C (lit.)

mp

153-159 °C (lit.)

mp

153-159 °C (lit.)

mp

153-159 °C (lit.)

form

crystals

form

crystals

form

crystals

form

powder or crystals

grade

ACS reagent

grade

ACS reagent

grade

-

grade

-

product line

Redi-Dri

product line

-

product line

-

product line

BioUltra

General description

Citric acid also called 2-hydroxy-propane-1,2,3-tricarboxylic acid, is a component of the tricarboxylic acid cycle in all organisms. Industrial production of citric acid use fungal, yeast and citrus fruit as the major source. Aspergillus niger is majorly used for citric acid production by fermentation Manganese inhibits fermentative production of citric acid Oral supplementation of citric acid promotes tricarboxylic acid cycle and oxidative phosphorylation in mitochondria, attenuating physical fatigue.

Application

Citric acidhas been used as a component of citrate buffer and Fe-free sauton′s medium. It has been used in hybridization chain reaction buffer for preequilibration of coverslips for testes sections.

Legal Information

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC
Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

pictograms

Exclamation mark

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Customers Also Viewed

Slide 1 of 7

1 of 7

Citric acid natural, ≥99.5%, FCC, FG

Sigma-Aldrich

W230633

Citric acid

Citric acid ≥99.5%, FCC, FG

Sigma-Aldrich

W230618

Citric acid

Citric acid certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland

Supelco

94676

Citric acid

Citric acid anhydrous fine-granular, EMPROVE® ESSENTIAL, Ph. Eur., BP, ChP, JP, USP, FCC, E 330

SAFC

1.00247

Citric acid

Citric acid United States Pharmacopeia (USP) Reference Standard

USP

1134368

Citric acid

Citric Acid, Anhydrous anhydrous Meets ACS Specifications, Meets Reagent Specifications for testing USP/NF monographs GR ACS

Supelco

CX1723

Citric Acid, Anhydrous

A comprehensive roadmap of murine spermatogenesis defined by single-cell RNA-seq
Green CD, et al.
Developmental Cell, 46(5), 651-667 (2018)
Methylene blue exerts a neuroprotective effect against traumatic brain injury by promoting autophagy and inhibiting microglial activation
Zhao M, et al.
Molecular Medicine Reports, 13(1), 13-20 (2016)
Effects of citric acid and L-carnitine on physical fatigue
Sugino T, et al.
Journal of Clinical Biochemistry and Nutrition, 41(3), 224-230 (2007)
Biotechnological production of citric acid
Max B, et al.
Brazilian Journal of Microbiology, 41(4), 862-875 (2010)
Two promoters in the esx-3 gene cluster of Mycobacterium smegmatis respond inversely to different iron concentrations in vitro
Fang Z, et al.
BMC Research Notes, 10(1), 426-426 (2017)

Articles

Redi-Dri™ prevents hygroscopic powders, such as inorganic salts, from absorbing moisture and forming clumps, leaving the salts free-flowing every time.

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service