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For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf
1.00244
Citric acid monohydrate
for analysis EMSURE® ACS,ISO,Reag. Ph Eur
Synonym(s):
2-Hydroxypropane-1,2,3-tricarboxylic acid, Hydroxytricarballylic acid
About This Item
Recommended Products
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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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).
Linkage
Analysis Note
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
Signal Word
Warning
Hazard Statements
Precautionary 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
Certificates of Analysis (COA)
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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