Important dilution note: Cloudiness after dilution is most commonly associated with non-pharmaceutical-grade dilution solution. Cloudy product concerns are not eligible for refund unless Pfizer pharmaceutical-grade dilution solution was used.

Vial Size: 3ml

Form: White Lyophilized Powder

CAS Number: 541-15-1

Chemical Name: (R)-3-Carboxy-2-(trimethylammonio)propyl hydroxide inner salt

Synonyms: L-Carnitine; Levocarnitine; (R)-Carnitine; Vitamin BT

Molecular Formula: C₇H₁₅NO₃

Molecular Weight: 161.2 g/mol

Structure: Quaternary ammonium zwitterion; R-configured stereocenter at C-3; trimethylammonium group and β-hydroxyl group

Purity: ≥98% (HPLC) — see batch COA

Form: Lyophilized white powder

Storage Conditions: Store at −20°C, desiccated, protected from light. Stable 24 months lyophilized.

Solubility: Freely soluble in water at ≥50 mg/mL

Biological Role: Quaternary ammonium compound essential for mitochondrial long-chain fatty acid transport; shuttles acyl groups across the inner mitochondrial membrane via carnitine palmitoyltransferase I/II (CPT-I/CPT-II); critical cofactor for beta-oxidation studied in cell bioenergetics models

Certificate of Analysis: Available for all batches.

For research and laboratory use only. Not for human or animal consumption. This product has not been evaluated by the FDA and is not intended to diagnose, treat, cure, or prevent any disease or condition. For use by qualified research professionals only.