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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Menthol, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Menthol impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Menthol-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Menthol Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(1R,2S,5R)-(-)-Menthol-d4 Stable Isotopes CS-T-95140 1450828-98-4 Enquire
(2R,5S)-L-Menthol-5-(4-amino-2-oxo-1(2H)-pyrimidinyl-13C)-1,... Stable Isotopes CS-T-97334 Not Available Enquire
(2R,5S)-L-Menthol-5-(4-amino-2-oxo-1(2H)-pyrimidinyl-15N2,13... Stable Isotopes CS-T-82726 1322623-13-1 Enquire
Menthol-d4 (mixture of diastereomers) Stable Isotopes CS-T-82203 1217765-02-0 Enquire
Menthol-d4 2,3,4-Tri-O-acetyl-β-D-glucuronide Methyl Ester Stable Isotopes CS-T-97335 Not Available Enquire
Menthol-d4 b-D-Glucuronide (Mixture of Diasteromers) Stable Isotopes CS-T-97336 Not Available Enquire
rel-Neomenthol-D4 Stable Isotopes CS-T-97269 Not Available Enquire


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(+)-Isomenthol API Standards CS-E-00061 23283-97-8 In Stock
L-Menthol API Standards CS-O-30974 2216-51-5 In Stock


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"L-Menthol-5-(acetyloxy)-1,3-oxathiolane-2-carboxylate" Impurities CS-T-82119 200396-20-9 Enquire
(±)-Neoisomenthol Impurities CS-T-83293 491-02-1 Enquire
(2S,5S)-D-Menthol-5-(acetyloxy)-1,3-oxathiolane-2-carboxylat... Impurities CS-T-57487 147126-68-9 Enquire
1-O-Dihydroxyacetyl-D-menthol Impurities CS-T-19071 1402543-99-0 Enquire
Menthyl isovalerate Impurities CS-O-57677 16409-46-4 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(-)-8-Phenylmenthol Intermediates CS-T-84236 65253-04-5 Enquire
(1S,2R,5S)-(+)-Menthol Intermediates CS-T-57485 15356-60-2 Enquire
(2R,5R)-5-Hydroxy[1,3]oxathiolane-2-carboxylic Acid L-Mentho... Intermediates CS-O-31943 147126-62-3 In Stock
(2R,5S)-L-Menthol-5-(4-amino-2-oxo-1(2H)-pyrimidinyl)-1,3-ox... Intermediates CS-T-81214 147027-10-9 Enquire
(2R,5S)-L-Menthol-5-(acetyloxy)-1,3-oxathiolane-2-carboxylat... Intermediates CS-T-80791 147126-65-6 Enquire
5-Fluoro ent-Lamivudine Acid D-Menthol Ester Intermediates CS-T-24082 764659-79-2 Enquire


Glucuronides

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"(1S,2R,5S)-(+)-Menthol ß-D-Glucuronide" Glucuronides CS-T-57486 114127-73-0 Enquire
(1R,2S,5R)-(-)-Menthol ß-D-Glucuronide Glucuronides CS-T-57484 79466-08-3 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(+)-Neomenthol Fine Chemicals CS-O-54065 2216-52-6 Enquire
DL-Menthol Fine Chemicals CS-O-13905 89-78-1 In Stock
Isomenthol Fine Chemicals CS-O-37217 3623-52-7 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"(1S,2R)-3,3-Dimethoxy-1,2-cyclobutanedicarboxylic Acid Di-L... Building Blocks CS-T-18545 138736-91-1 Enquire
"(2R,5R)-L-Menthol-5-(acetyloxy)-1,3-oxathiolane-2-carboxyla... Building Blocks CS-T-57488 147027-09-6 Enquire