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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for L-carnitine, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our L-carnitine 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 L-carnitine-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.

L-carnitine Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"D,L-Carnitine-d3 Chloride" Stable Isotopes CS-T-71029 119766-67-5 Enquire
"Decanoyl-10,10,10,d3-L-carnitine Chloride" Stable Isotopes CS-T-73680 1297271-50-1 Enquire
(±)-2-Methylbutyryl-L-carnitine-d3 HCl (N-methyl-d3) Stable Isotopes CS-C-01344 Not Available Enquire
(2R)-3-Carboxy-2-[(9-carboxy-1-oxononyl)oxy]-N,N,N-trimethyl... Stable Isotopes CS-T-98357 102636-85-1(Unlabelled) Enquire
[(3R)-3-Hydroxydodecanoyl]-L-carnitine-d3 Inner Salt Stable Isotopes CS-T-98344 Not Available Enquire
[(3R)-3-Hydroxyhexadecanoyl]-L-carnitine-d3 Inner Salt Stable Isotopes CS-T-98341 Not Available Enquire
[(3R)-3-Hydroxyhexanoyl]-L-carnitine-d3 Inner Salt Stable Isotopes CS-T-98340 Not Available Enquire
[(3R)-3-Hydroxyoctadecanoyl]-L-carnitine-d3 Inner Salt Stable Isotopes CS-T-98343 1469901-05-0(Unlabelled) Enquire
2,2-Dimethylpropionyl-L-carnitine-d3 HCl (N-methyl-d3) Stable Isotopes CS-C-01426 73801-19-1 (Unlabelled) Enquire
2-Methylbutyryl-L-Carnitine-d3 Chloride Stable Isotopes CS-T-101132 Not Available Enquire
2-Methylbutyryl-L-Carnitine-d9 Chloride Stable Isotopes CS-O-35595 Not Available Enquire
3-Hydroxy-9-hexadecenoyl-L-carnitine-d3 Stable Isotopes CS-T-96936 Not Available Enquire
3-Methylbutyryl-L-carnitine-d3 HCl (N-methyl-d3) Stable Isotopes CS-C-01343 139144-12-0 (Unlabelled) Enquire
4-Hydroxybutyryl-L-carnitine-13C3 Stable Isotopes CS-T-97456 Not Available Enquire
Acetyl L-Carnitine-13C3 Chloride Stable Isotopes CS-T-97845 Not Available Enquire
Acetyl L-Carnitine-d3 Hydrochloride Stable Isotopes CS-T-47163 1334532-17-0 Enquire
Acetyl-d3 L-Carnitine Hydrochloride Stable Isotopes CS-T-47164 362049-62-5 In Stock
Acetyl-L-carnitine-(N-methyl-d3) Stable Isotopes CS-BX-00721 204259-54-1 Enquire
Adipoyl-L-carnitine-d3 Trifluoroacetate Stable Isotopes CS-T-97837 Not Available Enquire
Arachidonoyl-L-carnitine-d3 (may contain up to 1% of d0) Stable Isotopes CS-T-94819 36816-11-2(Unlabelled) Enquire
Butyryl-d7-L-carnitine HCI Stable Isotopes CS-C-01345 162067-50-7 (Unlabelled) Enquire
Decanoyl-L-Carnitine-[d3] Hydrochloride (Solution) Stable Isotopes CS-I-00640 2483831-87-2 Enquire
Decanoyl-L-carnitine-d3 HCl (N-methyl-d3) Stable Isotopes CS-O-35597 2483831-87-2 Enquire
Dodecanoyl-L-carnitine-[d3] Hydrochloride (Solution) Stable Isotopes CS-I-00643 2687960-76-3 Enquire
Dodecanoyl-L-carnitine-d3 HCl Stable Isotopes CS-O-48462 2687960-76-3 Enquire
Dodecanoyl-L-carnitine-d3 HCl (N-methyl-d3) Stable Isotopes CS-O-35598 Not Available Enquire
Hexadecanedioic Acid Mono-L-carnitine-d3 Ester Chloride Stable Isotopes CS-T-96940 42150-38-9(Unlabelled) Enquire
Hexanoyl-d3-L-carnitine Chloride Stable Isotopes CS-T-97465 Not Available Enquire
Hexanoyl-L-carnitine-d3 HCl (N-methyl-d3) Stable Isotopes CS-O-35596 162067-53-0 (Unlabeled) Enquire
Isobutyryl L-Carnitine-d6 Chloride Stable Isotopes CS-T-96919 Not Available Enquire
Isovaleryl L-Carnitine-d3 Chloride Stable Isotopes CS-T-100119 Not Available Enquire
Isovaleryl L-Carnitine-d9 Chloride Stable Isotopes CS-T-56927 1334532-23-8 Enquire
Lauroyl-d3-L-carnitine Hydrochloride Stable Isotopes CS-T-98551 1297271-52-3 Enquire
Lauroyl-L-carnitine-d3 Hydrochloride Stable Isotopes CS-T-100106 Not Available Enquire
L-CARNITINE Hydrochloride, O-BUTYRYL N-METHYL-D3 Stable Isotopes CS-R-00610 1334532-21-6 Enquire
L-Carnitine inner salt D3 Stable Isotopes CS-CX-00209 126372-70-1 Enquire
L-Carnitine Trimethyl-d9 Stable Isotopes CS-R-00603 126827-79-0 Enquire
L-Carnitine-13C Chloride Stable Isotopes CS-T-96990 Not Available Enquire
L-Carnitine-15N Stable Isotopes CS-T-103366 541-15-1(unlabelled) Enquire
L-Carnitine-d3 Hydrochloride Stable Isotopes CS-R-00606 350818-62-1 In Stock
L-Carnitine-d9 Chloride Stable Isotopes CS-T-93994 6645-46-1 (Unlabelled) Enquire
Malonyl-L-carnitine(N,N,N-tri-13C-methyl) Trifluoroacetate Stable Isotopes CS-T-97339 Not Available Enquire
Malonyl-L-carnitine-d3 Trifluoroacetate Stable Isotopes CS-T-97340 Not Available Enquire
MCPA-L-carnitine-d9 Chloride (Mixture of Diastereomers) Stable Isotopes CS-T-96903 Not Available Enquire
Methylmalonyl DL-Carnitine-d3 Chloride (Mixture of Diastereo... Stable Isotopes CS-T-102492 821794-54-1(Unlabelled) Enquire
Myristoyl-L-carnitine-13C3 Hydrochloride Stable Isotopes CS-T-99957 Not Available Enquire
Myristoyl-L-carnitine-d3 Hydrochloride Stable Isotopes CS-T-59043 1334532-25-0 Enquire
Nonadecanoyl-L-carnitine-d3 HCl (N-methyl-d3) Stable Isotopes CS-C-01402 Not Available Enquire
Octadecanedioic Acid Mono-L-carnitine-d3 Ester Chloride Stable Isotopes CS-T-96888 Not Available Enquire
Octanoyl L-Carnitine-d3 Chloride Stable Isotopes CS-T-59860 1334532-24-9 Enquire
Oleoyl-L-carnitine-13C3 Stable Isotopes CS-T-97244 38677-66-6(Unlabelled) Enquire
Palmitoyl-16,16,16-d3-L-carnitine Hydrochloride Stable Isotopes CS-T-102154 Not Available Enquire
Palmitoyl-L-Carnitine-[d3] Hydrochloride (Solution) Stable Isotopes CS-I-00668 1334532-26-1 Enquire
Palmitoyl-L-carnitine-13C3 Hydrochloride Stable Isotopes CS-T-99907 Not Available Enquire
Palmitoyl-L-carnitine-13C3 Hydrochloride Stable Isotopes CS-T-97235 18877-64-0 (Unlabelled) Enquire
Palmitoyl-L-carnitine-d3 Hydrochloride Stable Isotopes CS-T-60123 1334532-26-1 Enquire
Propionyl-d5-L-carnitine HCl Stable Isotopes CS-C-01346 119793-66-7 (Unlabelled) Enquire
Stearoyl-L-carnitine-13C3 Chloride Stable Isotopes CS-T-95791 32350-57-5(Unlabelled) Enquire
Succinyl-L-carnitine-13C3 Chloride Stable Isotopes CS-T-99832 Not Available Enquire
Tigloyl-L-carnitine-d3 HCl (N-methyl-d3) Stable Isotopes CS-C-01335 Not Available Enquire
Valeryl-L-carnitine Chloride-13C3 Stable Isotopes CS-T-97118 Not Available Enquire


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
DL-Carnitine API Standards CS-T-69061 406-76-8 Enquire
L-Carnitine API Standards CS-O-01777 541-15-1 In Stock


Metabolites

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
L-CARNITINE Hydrochloride, O-PROPIONYL Metabolites CS-R-00622 20064-19-1 Enquire


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Acetyl-l-carnitine Impurities CS-O-30532 3040-38-8 In Stock
Acetyl-L-Carnitine Hydrochloride Impurities CS-T-47162 5080-50-2 In Stock
DL-Carnitine Benzyl Ester Chloride Impurities CS-T-69497 16224-32-1 Enquire
Isovaleryl L-Carnitine Chloride Impurities CS-T-30105 139144-12-0 Enquire
Isovaleryl-L-carnitine Impurities CS-O-30613 31023-24-2 In Stock
Lauroyl-L-carnitine Hydrochloride Impurities CS-T-30926 6919-91-1 In Stock
N-(5-Fluoresceinyl)-L-carnitine-O-thiocarbamate Impurities CS-T-54790 1258239-73-4 Enquire
Octanoyl-L-carnitine Hydrochloride Impurities CS-O-20090 25243-95-2(free base) In Stock
Tetradecenoyl-L-carnitine inner salt Impurities CS-EK-02823 1186416-86-3 Enquire
Tetradecenoyl-L-carnitine-d3 Hydrochloride Impurities CS-O-20096 1186416-86-3(Unlabeled) In Stock
Valeryl L-carnitine Impurities CS-O-56310 40225-14-7 Enquire
Valeryl-L-carnitine Chloride Impurities CS-T-87789 162040-64-4 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-Methylcrotonyl L-Carnitine Intermediates CS-T-58055 64656-41-3 Enquire
Butyryl-L-Carnitine Intermediates CS-O-14445 25576-40-3 Enquire
Decanoyl-L-carnitine Chloride Intermediates CS-T-73440 369651-88-7 Enquire
Lauroyl-DL-carnitine chloride Intermediates CS-CE-00766 14919-37-0 Enquire
Octadecanedioic Acid Mono-L-carnitine Ester Chloride Intermediates CS-T-83416 123233-50-1 Enquire
Palmitoyl-DL-carnitine chloride Intermediates CS-T-84517 6865-14-1 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
D,L-Carnitine Chloride Fine Chemicals CS-T-71324 461-05-2 In Stock


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Hydroxybutyryl-L-carnitine Building Blocks CS-T-79277 107870-81-5 Enquire
Hexadecanedioic Acid Mono-L-carnitine Ester Chloride Building Blocks CS-T-78680 42150-38-9 Enquire
Hexanoyl-L-carnitine  HCl Building Blocks CS-O-20078 6920-35-0 In Stock
Hexanoyl-L-carnitine Chloride Building Blocks CS-T-78988 162067-53-0 Enquire
L-Carnitine-L-tartrate Building Blocks CS-O-10983 36687-82-8 In Stock
Myristoyl-L-carnitine Hydrochloride Building Blocks CS-T-59042 173686-73-2 Enquire
Octadecanoyl-L-carnitine HCl Building Blocks CS-O-20092 32350-57-5 In Stock
Oleoyl-L-carnitine Building Blocks CS-T-83808 38677-66-6 Enquire
Palmitoyl-L-carnitine Hydrochloride Building Blocks CS-O-10186 18877-64-0 Enquire