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Cleanchem is a trusted provider of premium pharmaceutical reference materials, specializing in Ascorbic Acid and its associated compounds. Our catalog includes pharmacopeial and non-pharmacopeial Ascorbic Acid impurities, metabolites, nitrosamine derivatives (N-NO compounds), and stable isotope-labeled products. These reference standards play a critical role in pharmaceutical R&D, supporting activities such as product formulation, ANDA and DMF submissions, quality assurance, analytical method development, and stability assessments.
All Ascorbic Acid-related substances undergo comprehensive characterization and are delivered with complete Certificates of Analysis and supporting analytical documentation to ensure regulatory adherence. Upon request, we can offer EP/USP traceable standards. Our products are routinely re-evaluated to maintain consistent quality and performance.

Ascorbic Acid EP Impurity A

CAT No: CL-ASCA-01 CAS No: 98-01-1 Mol Wt: 96.1 Mol F: C5H4O2 Inv Status: Custom Synthesis

Chemical Name: Furan-2-carbaldehyde

Ascorbic Acid EP Impurity C

CAT No: CL-ASCA-02 CAS No: 526-98-7 Mol Wt: 194.1 Mol F: C6H10O7 Inv Status: In Stock

Chemical Name: L-Xylo-hex-2-ulosonic acid

Ascorbic Acid EP Impurity D

CAT No: CL-ASCA-03 CAS No: 3031-98-9 Mol Wt: 208.2 Mol F: C7H12O7 Inv Status: In Stock

Chemical Name: Methyl L-xylo-hex-2-ulosonate

Ascorbic Acid EP Impurity G

CAT No: CL-ASCA-04 CAS No: 66757-69-5 Mol Wt: 190.1 Mol F: C6H6O7 Inv Status: Custom Synthesis

Chemical Name: (2R)-2-[(2R)-3,4-Dihydroxy-5-oxo-2,5-dihydrofuran-2-yl]-2-hydroxyacetic acid

Ascorbic Acid EP Impurity H

CAT No: CL-ASCA-05 CAS No: 122046-79-1 Mol Wt: 204.1 Mol F: C7H8O7 Inv Status: Custom Synthesis

Chemical Name: Methyl (R)-2-((R)-3,4-dihydroxy-5-oxo-2,5-dihydrofuran-2-yl)-2-hydroxyacetate ; L-threo-Hex-????naric acid 1,??Lactone 6-Methyl Ester

3-O-Ethyl-L-ascorbic Acid

CAT No: CL-ASCA-06 CAS No: 86404-04-8 Mol Wt: 204.2 Mol F: C8H12O6 Inv Status: Custom Synthesis

Chemical Name: (R)-5-((S)-1,2-Dihydroxyethyl)-4-ethoxy-3-hydroxyfuran-2(5H)-one

Ascorbic Acid EP Impurity F

CAT No: CL-ASCA-07 CAS No: 89-65-6 Mol Wt: 176.1 Mol F: C6H8O6 Inv Status: In Stock

Chemical Name: (5R)-5-[(1R)-1,2-Dihydroxyethyl]-3,4-dihydroxyfuran-2(5H)-one

L-Dehydro Ascorbic Acid

CAT No: CL-ASCA-08 CAS No: 490-83-5 Mol Wt: 174.1 Mol F: C6H6O6 Inv Status: Custom Synthesis

Chemical Name: (R)-5-((S)-1,2-Dihydroxyethyl)furan-2,3,4(5H)-trione

L-Ascorbic Acid Monosodium Salt (Sodium Ascorbate)

CAT No: CL-ASCA-09 CAS No: 134-03-2 Mol Wt: 176.1 : 23.0 Mol F: C6H8O6 : Na Inv Status: Custom Synthesis

Chemical Name: (R)-5-((S)-1,2-Dihydroxyethyl)-3,4-dihydroxyfuran-2(5H)-one, sodium salt

L-Ascorbic Acid

CAT No: CL-ASCA-10 CAS No: 50-81-7 Mol Wt: 176.1 Mol F: C6H8O6 Inv Status: In Stock

Chemical Name: (R)-5-((S)-1,2-dihydroxyethyl)-3,4-dihydroxyfuran-2(5H)-one

2,3-Diketo-L-gulonic acid

CAT No: CL-ASCA-11 CAS No: 3445-22-5 Mol Wt: 192.1 Mol F: C6H8O7 Inv Status: Custom Synthesis

Chemical Name: (4R,5S)-4,5,6-Trihydroxy-2,3-dioxohexanoic acid

Ascorbic Acid EP Impurity C Hydrate

CAT No: CL-ASCA-12 CAS No: 342385-52-8 Mol Wt: 194.1 : 18.0 Mol F: C6H10O7 : H2O Inv Status: Custom Synthesis

Chemical Name: L-xylo-hex-2-ulosonic acid hydrate

Ascorbic Acid EP Impurity E

CAT No: CL-ASCA-13 CAS No: 144-62-7 Mol Wt: 90 Mol F: C2H2O4 Inv Status: In Stock

Chemical Name: Oxalic acid

Ascorbyl glucoside

CAT No: CL-ASCA-14 CAS No: 129499-78-1 Mol Wt: 338.3 Mol F: C12H18O11 Inv Status: Custom Synthesis

Chemical Name: (R)-5-((S)-1,2-Dihydroxyethyl)-4-hydroxy-3-(((2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)furan-2(5H)-one

2-O-Ethyl-L-Ascorbic Acid

CAT No: CL-ASCA-15 CAS No: 112894-37-8 Mol Wt: 204.2 Mol F: C8H12O6 Inv Status: Custom Synthesis

Chemical Name: (R)-5-((S)-1,2-Dihydroxyethyl)-3-ethoxy-4-hydroxyfuran-2(5H)-one

Ascorbyl Palmitate

CAT No: CL-ASCA-16 CAS No: 137-66-6 Mol Wt: 414.5 Mol F: C22H38O7 Inv Status: Custom Synthesis

Chemical Name: (S)-2-((R)-3,4-Dihydroxy-5-oxo-2,5-dihydrofuran-2-yl)-2-hydroxyethyl palmitate

D-Xylo-2-hexulosonic Acid Methyl Ester

CAT No: CL-ASCA-17 CAS No: 67776-07-2 Mol Wt: 208.2 Mol F: C7H12O7 Inv Status: Custom Synthesis

Chemical Name: 2-Keto-D-gulonic Acid Methyl Ester

L(+) Gluconic Acid

CAT No: CL-ASCA-18 CAS No: 157663-13-3 Mol Wt: 196.2 Mol F: C6H12O7 Inv Status: Custom Synthesis

Chemical Name: (2S,3R,4S,5S)-2,3,4,5,6-Pentahydroxyhexanoic acid

Magnesium Ascorbyl Phosphate

CAT No: CL-ASCA-19 CAS No: 113170-55-1 Mol Wt: 256.1 : 1.5(24.3) Mol F: C6H9O9P : 1.5(Mg) Inv Status: Custom Synthesis

Chemical Name: L-?Ascorbic acid, 2-?(dihydrogen phosphate)?, magnesium salt

2,3-Diketogulonic Acid

CAT No: CL-ASCA-20 CAS No: 3409-57-2 Mol Wt: 192.1 Mol F: C6H8O7 Inv Status: Custom Synthesis

Chemical Name: (4S,5R)-4,5,6-Trihydroxy-2,3-dioxohexanoic acid

D-Ascorbic Acid

CAT No: CL-ASCA-21 CAS No: 10504-35-5 Mol Wt: 176.1 Mol F: C6H8O6 Inv Status: Custom Synthesis

Chemical Name: (S)-5-((R)-1,2-dihydroxyethyl)-3,4-dihydroxyfuran-2(5H)-one

D-Threonic acid-1,4,-lactone

CAT No: CL-ASCA-22 CAS No: 23732-41-4 Mol Wt: 118.1 Mol F: C4H6O4 Inv Status: Custom Synthesis

Chemical Name: (3S,4R)-3,4-Dihydroxydihydrofuran-2(3H)-one

L-Threosone

CAT No: CL-ASCA-23 CAS No: 54097-87-9 Mol Wt: 118.1 Mol F: C4H6O4 Inv Status: Custom Synthesis

Chemical Name: (S)-3,4-Dihydroxy-2-oxobutanal

Threonic acid

CAT No: CL-ASCA-24 CAS No: 12/4/3909 Mol Wt: 136.1 Mol F: C4H8O5 Inv Status: Custom Synthesis

Chemical Name: (2S,3R)-2,3,4-trihydroxybutanoic acid

Xylosone

CAT No: CL-ASCA-25 CAS No: 26188-06-7 Mol Wt: 148.1 Mol F: C5H8O5 Inv Status: Custom Synthesis

Chemical Name: (3S,4R)-3,4,5-trihydroxy-2-oxopentanal

Ascorbyl Impurity 1

CAT No: CL-ASCA-26 CAS No: 21675-47-8 Mol Wt: 194.1 Mol F: C6H10O7 Inv Status: Custom Synthesis

Chemical Name: (3R,4S,5R)-3,4,5,6-Tetrahydroxy-2-oxohexanoic acid

Ascorbic Acid Impurity 1

CAT No: CL-ASCA-27 CAS No: 1822601-67-1 Mol Wt: 190.1 Mol F: C6H6O7 Inv Status: Custom Synthesis

Chemical Name: 3-(Hydroxymethyl)-5,6-dioxo-1,4-dioxane-2-carboxylic acid

Ascorbic Acid Impurity 2

CAT No: CL-ASCA-28 CAS No: 59173-60-3 Mol Wt: 192.1 Mol F: C6H8O7 Inv Status: Custom Synthesis

Chemical Name: 3,3,3a,6-Tetrahydroxytetrahydrofuro[3,2-b]furan-2(3H)-one

Ascorbic Acid Impurity 3

CAT No: CL-ASCA-29 CAS No: NA Mol Wt: 172.1 Mol F: C6H4O6 Inv Status: Custom Synthesis

Chemical Name: Dihydrofuro[3,4-b][1,4]dioxine-2,3,5(4aH)-trione

Type:Impurity Reference Standard

Total Products: 29

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