L-Carnitine (inner salt) research grade — bulk supply

Regulatory positioning: Nutraceutical / cosmetic grade. L-Carnitine is supplied as nutraceutical / cosmetic grade raw material. Not a finished pharmaceutical product. Subject to buyer compliance with applicable supplement and cosmetic regulations.

Overview

L-Carnitine (inner salt) is the levorotatory form of 3-hydroxy-4-(trimethylammonio)butanoate, supplied by SPK Pharma India as a research-grade analytical reference standard. The inner salt (also called the betaine form) is the zwitterionic form of the molecule, distinct from the tartrate or hydrochloride salt forms. The inner salt is the form typically used as an analytical reference standard in research laboratories, in cell-based assays of fatty acid metabolism, and in the development of LC-MS and HPLC methods for carnitine quantification. SPK Pharma India supplies L-Carnitine in bulk research tiers (100 g, 500 g, 1 kg) for research laboratories, distributors, and contract manufacturers. The product is supplied for research and analytical applications only.

Specifications

Research context

L-Carnitine is one of the most-studied research compounds in fatty acid metabolism research, with central roles in the transport of long-chain fatty acids across the inner mitochondrial membrane for β-oxidation. The inner salt form is the form used as an analytical reference standard in research laboratories that study carnitine palmitoyltransferase (CPT) activity, fatty acid oxidation, and the regulation of cellular energy metabolism in defined cell-based systems. It is also used in research contexts that distinguish L-carnitine (the endogenous enantiomer) from D-carnitine (the non-physiological enantiomer) and from the racemic DL-carnitine mixture.

Bulk supply at the 100 g / 500 g / 1 kg scale is positioned for analytical reference-standard programmes, calibration curve preparation, and larger in-vitro research programmes. The lot-matched COA documents the actual HPLC purity, the specific rotation (a critical identity parameter for the chiral molecule), and the mass spectrometry identity. SPK Pharma India does not make therapeutic, clinical, diagnostic, or dosing claims for this product. The compound is supplied strictly for in-vitro research, analytical method development, and reference-standard work.

For researchers new to the compound, the standard analytical reference points are CAS 541-15-1, the inner salt form, the calculated molecular weight of 161.20 g/mol, the specific rotation range, the lyophilized powder form, and the documented purity threshold (≥99% HPLC). The disambiguation from L-carnitine tartrate, L-carnitine hydrochloride, and the racemic DL-carnitine mixture is important — the inner salt is the analytical reference-standard form, not the salt forms that are common in consumer-grade supplements.

Packaging and supply

• 100 g research pack — for method development, calibration curve preparation, and small-batch analytical programmes. Standard MOQ: 1 pack.
• 500 g research pack — for ongoing research programmes with higher per-assay demand. Standard MOQ: 1 pack.
• 1 kg research pack — for reference-standard stock programmes and large in-vitro research programmes. Standard MOQ: 1 pack.
• Bulk pack — on application, for annual supply contracts and recurring orders.

Distributor pricing is available on application. Annual supply contracts with scheduled recurring dispatch are available for repeat buyers. Lead time for in-stock SKUs is typically 5 business days from purchase order confirmation; lead time for scheduled production is typically 4 to 6 weeks.

Quality and documentation

Every lot of L-Carnitine ships with a lot-matched Certificate of Analysis documenting identity (HPLC retention time, ¹H-NMR, and mass spectrometry), purity (HPLC), specific rotation, appearance, lot number, and synthesis batch reference. A representative sample of every lot is independently verified by a third-party analytical laboratory before release. MSDS is supplied with every shipment. The COA template, the lot-traceability workflow, and the third-party verification scope are documented on the Quality page.

Storage and handling

• Store at 2°C to 8°C in the original sealed container.
• Protect from light and moisture. The inner salt is hygroscopic.
• Allow the sealed container to reach room temperature before opening, to avoid condensation.
• Reconstitute in cold, sterile, low-endotoxin research-grade water or in a cold buffer at the working concentration required by the assay. L-Carnitine is highly water-soluble.
• Do not refreeze once reconstituted; aliquot and store at working concentration.
• For long-term stability, store the dry powder at 2°C to 8°C, sealed and protected from moisture.

Shipping

L-Carnitine is shipped as a crystalline lyophilized powder in sealed containers within temperature-validated packaging. International lanes are routed through dedicated life-science logistics partners with cold-chain handling. Standard dispatch is within 5 business days of purchase order confirmation. SPK Pharma India ships to the United States, the European Union, the United Kingdom, Canada, MENA, APAC, and LATAM. Full export documentation, including commercial invoice, packing list, certificate of origin, COA, and MSDS, is included with every shipment. Destination-specific documentation is supported on request.

Compliance

L-Carnitine is supplied as nutraceutical / cosmetic grade raw material. Not a finished pharmaceutical product. Subject to buyer compliance with applicable supplement and cosmetic regulations. SPK Pharma India does not make therapeutic, clinical, diagnostic, or dosing claims for this product. The buyer is responsible for end-use classification in the destination jurisdiction and for compliance with applicable supplement, cosmetic, and ingredient regulations.

Lead form CTA

To request a wholesale quote for L-Carnitine (inner salt), contact the trade desk with the subject line "L-Carnitine wholesale quote" and your company details, expected volume, and destination country. Distributor pricing is available on application. The desk responds within one business day.

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