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1.00244

Supelco

Citric acid monohydrate

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

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Synonym(s):
2-Hydroxypropane-1,2,3-tricarboxylic acid, Hydroxytricarballylic acid
Linear Formula:
HOC(COOH)(CH2COOH)2 · H2O
CAS Number:
Molecular Weight:
210.14
Beilstein:
4018641
MDL number:
EC Index Number:
201-069-1

grade

ACS reagent

Quality Level

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 (PO43-): ≤10 ppm
sulfate (SO42-): ≤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

SMILES string

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

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

InChI key

YASYEJJMZJALEJ-UHFFFAOYSA-N

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1 of 4

This Item
271021.002431.00242
vibrant-m

1.00244

Citric acid monohydrate

vibrant-m

27102

Citric acid monohydrate

vibrant-m

1.00243

Citric acid monohydrate

vibrant-m

1.00242

Citric acid monohydrate

solubility

880 g/L

solubility

-

solubility

880 g/L

solubility

880 g/L

form

solid

form

grit

form

fine powder

form

coarse powder, crystalline

Quality Level

300

Quality Level

200

Quality Level

500

Quality Level

500

impurities

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

impurities

residual solvents, complies, ≤0.0005% heavy metals (as Pb), 7.5-8.8% water (Karl Fischer)

impurities

-

impurities

-

grade

ACS reagent

grade

-

grade

-

grade

-

Linkage

Replaces: CX1725-1; CX1725-3; CX1725

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.

Legal Information

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

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

Eye Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

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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