1.00468

L(+)-Ascorbic Acid

for analysis EMSURE^® ACS,Reag. Ph Eur

• Synonym(s): L(+)-Ascorbic Acid
• CAS Number: 50-81-7
• Molecular Weight: 176.12
• MDL number: MFCD00064328
• UNSPSC Code: 12352106
• EC Index Number: 200-066-2
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 300
• agency: reag. Ph. Eur.
• product line: EMSURE^®
• assay: 99.0-100.5% (iodometric)
• form: crystalline powder
• autoignition temp.: 380 °C
• potency: 11900 mg/kg LD₅₀, oral (Rat)
• technique(s): thin layer chromatography (TLC): suitable
• impurities: ≤0.1% Related substances (unspecified impurities singly) (HPLC); ≤0.15% Related substances (Impurity C) (HPLC); ≤0.15% Related substances (Impurity D) (HPLC); ≤0.2% Oxalic acid; ≤0.2% Related substances (sum of impurities (except impurity A and D)) (HPLC)
• sulfated ash (600 °C): ≤0.05%
• loss: ≤0.1% loss on drying, 105 °C
• color: clear
• pH: 2.2-2.5 (20 °C, 50 g/L in H₂O)
• solubility: 330 g/L
• density: 1.65 g/cm³ at 20 °C
• bulk density: 500‑900 kg/m³
• anion traces: chloride (Cl^-): ≤50 ppm; sulfate (SO₄^2-): ≤20 ppm
• cation traces: Cu: ≤5 ppm; Fe: ≤2 ppm; heavy metals: ≤10 ppm
• storage temp.: 15-25°C
• InChI: 1S/C6H8O6/c7-1-2(8)5-3(9)4(10)6(11)12-5/h2,5,7-8,10-11H,1H2
• InChI key: TYQCGQRIZGCHNB-UHFFFAOYSA-N

Description

General description

for analysis EMSURE^® ACS,Reag. Ph Eur

Application

• Sensitive determination in metabolic research: A study utilized (+/-)-4-Hydroxy-3-methoxymandelic Acid-D₃ in a gas chromatography-negative-ion chemical-ionization mass spectrometry analysis, providing a method for sensitive determination of tyrosine metabolites. This application supports the use of deuterated compounds in stable isotope-labeled tracer experiments to investigate metabolism in humans (Shimamura et al., 1986).

Analysis Note

Assay (iodometric)99.0 - 100.5 %Identity (IR-spectrum)conformsAppearancewhite or almost white, cristalline powderAppearance of solution (50 g/l CO₂-free water)clear (≤ 3 NTU) and not so intense in colour than reference solution BY₇pH (50 g/l CO₂-free water)2.1 - 2.6Spec. rotation [α²0/D (100 g/l, water)+20.5 - +21.5 °Chloride (Cl)≤ 50 ppmSulfate (SO₄)≤ 20 ppmCu (Copper)≤ 5 ppmFe (Iron)≤ 2 ppmHeavy metals (ACS)≤ 10 ppmOxalic acid≤ 0.2Related substances (HPLC) (Impurity C)≤ 0.15 %Related substances (HPLC) (Impurity D)≤ 0.15 %Related substances (HPLC) (unspecified impurities singly)≤ 0.10 %Related substances (HPLC) (sum of impurities (except impurity A and D))≤ 0.2 %Sulfated ash (600 °C)≤ 0.05 %Loss on Drying (105 °C)≤ 0.1 %

Legal Information

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

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable