Citric acid monohydrate

Name: Citric acid monohydrate
Brand: MM

for analysis EMSURE^® ACS,ISO,Reag. Ph Eur

Synonym(s):

2-Hydroxypropane-1,2,3-tricarboxylic acid, Hydroxytricarballylic acid

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About This Item

Linear Formula:

HOC(COOH)(CH₂COOH)₂ · H₂O

CAS Number:

5949-29-1

Molecular Weight:

210.14

UNSPSC Code:

12352106

NACRES:

NA.21

EC Index Number:

201-069-1

MDL number:

MFCD00149972

Beilstein/REAXYS Number:

4018641

assay:

99.5-100.5% anhydrous basis (acidimetric)

grade:

ACS reagent

form:

solid

solubility:

880 g/L

Product Name

Citric acid monohydrate, for analysis EMSURE^® ACS,ISO,Reag. Ph Eur

InChI

1S/C6H8O7.H2O/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);1H2

SMILES string

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

InChI key

YASYEJJMZJALEJ-UHFFFAOYSA-N

grade

ACS reagent

agency

reag. ISO
reag. Ph. Eur.

vapor pressure

<1 Pa ( 25 °C)

product line

EMSURE^®

assay

99.5-100.5% anhydrous basis (acidimetric)

form

solid

potency

3000 mg/kg LD₅₀, oral (Rat)

composition

Water, 7.5-8.8% Karl Fischer

impurities

≤200 ppm Sulfated ash
≤50 ppm In water insoluble matter

color

clear
white to almost white

pH

1.85 (25 °C, 50 g/L in H₂O)

pKa

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

mp

135-152 °C

transition temp

flash point 173.9 °C

solubility

880 g/L

density

1.54 g/cm³ at 20 °C

bulk density

800‑1000 kg/m³

anion traces

chloride (Cl^-): ≤5 ppm
oxalate (as oxalic acid): ≤50 ppm
phosphate (PO₄^3-): ≤10 ppm
sulfate (SO₄^2-): ≤20 ppm

cation traces

Al: ≤0.2 ppm
As: ≤1 ppm
Cu: ≤5 ppm
Fe: ≤3 ppm
Hg: ≤1 ppm
Pb: ≤0.5 ppm
heavy metals (as Pb): ≤5 ppm

storage temp.

2-30°C

Quality Level

300

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Related Categories

Acids

Analysis Note

Assay (acidimetric, calc. on anhydrous substance): 99.5 - 100.5 %
Identity (IR-spectrum): passes test
Appearance: white to almost white or colorless crystals
Appearance of solution (200 g/l; water): clear (≤ 3 NTU) and not more intense in color than reference solution Y₇, BY₇ or GY₇
In water insoluble matter: ≤ 50 ppm
Chloride (Cl): ≤ 5 ppm
Phosphate (PO₄): ≤ 10 ppm
Sulphate (SO₄): ≤ 20 ppm
Heavy metals (as Pb): ≤ 5 ppm
Al (Aluminium): ≤ 0.2 ppm
As (Arsenic): ≤ 1 ppm
Hg (Mercury): ≤ 1 ppm
Cu (Copper): ≤ 5 ppm
Fe (Iron): ≤ 3 ppm
Fe (Iron, acc. to Reag. Ph Eur.): suitable to use in the limit test for iron
Pb (Lead): ≤ 0.5 ppm
Oxalates (as C₂H₂O₄): ≤ 50 ppm
Readily carbonisable substance: passes test
Sulfated ash: ≤ 200 ppm
Water (according to Karl Fischer): 7.5 - 8.8 %
Corresponds to ACS, ISO 6353/2, Reag. Ph. Eur.

Application

Biopolymeric Blends of Thermoplastic Starch and Polylactide as Sustainable Packaging Materials: This publication uses citric acid monohydrate in the synthesis of biodegradable polymers, highlighting its utility in developing sustainable materials within the industrial manufacturing and environmental sectors (Jozinović A et al., 2024).

Other Notes

Replaces: CX1725-1; CX1725-3; CX1725

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

pictograms

GHS07

signalword

Warning

hcodes

H319,H335

pcodes

P261 - P264 - P271 - P280 - P304 + P340 + P312 - P305 + P351 + P338

Hazard Classifications

Eye Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

345.0 °F - closed cup

flash_point_c

173.9 °C - closed cup

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