If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
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/418/501/product-dating-information-06-25-mk.pdf
1.00244
Citronensäure Monohydrat
for analysis EMSURE® ACS,ISO,Reag. Ph Eur
Synonym(e):
2-Hydroxypropan-1,2,3-tricarbonsäure, Hydroxytricarballylsäure
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Über diesen Artikel
grade
ACS reagent
Quality Segment
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
Application
- Biopolymeric Blends of Thermoplastic Starch and Polylactide as Sustainable Packaging Materials: In dieser Publikation wird Zitronensäure-Monohydrat bei der Synthese biologisch abbaubarer Polymere verwendet, was seinen Nutzen bei der Entwicklung nachhaltiger Materialien im industriellen Fertigungs- und Umweltsektor unterstreicht (Jozinović A et al., 2024).
Analysis Note
Identität (IR-Spektrum): entspricht
Aussehen: weiße bis fast weiße oder farblose Kristalle
Aussehen der Lösung (200 g/l; Wasser): klar (≤ 3 NTU) oder nicht mehr farbintensiv als die Referenzlösung Y₇, BY₇ oder GY₇
In Wasser unlösliche Anteile: ≤ 50 ppm
Chlorid (Cl): ≤ 5 ppm
Phosphat (PO₄): ≤ 10 ppm
Sulfat (SO₄): ≤ 20 ppm
Schwermetalle (als Pb): ≤ 5 ppm
Al (Aluminium): ≤ 0,2 ppm
As (Arsen): ≤ 1 ppm
Hg (Quecksilber): ≤ 1 ppm
Cu (Kupfer): ≤ 5 ppm
Fe (Eisen): ≤ 3 ppm
Fe (Eisen, gemäß Reag. Ph Eur): geeignet für den Grenzwerttest für Eisen
Pb (Blei): ≤ 0,5 ppm
Oxalate (als C₂H₂O₄): ≤ 50 ppm
Verhalten gegen Schwefelsäure: entspricht
Sulfatasche: ≤ 200 ppm
Wasser (nach Karl Fischer): 7,5 - 8,8 %
Entspricht ACS, ISO 6353/2, Reag. Ph Eur
Other Notes
Legal Information
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Signalwort
Warning
Gefahrencodes
Sicherheitshinweise
Hazard Classifications
Eye Irrit. 2 - STOT SE 3
Zielorgane
Respiratory system
Lagerklasse
11 - Combustible Solids
Flammpunkt (°F)
345.0 °F - closed cup
Flammpunkt (°C)
173.9 °C - closed cup
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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