Molecule structure of L(-)-Carnitine hydrochloride (CAS NO.6645-46-1):

IUPAC Name: (2,4-Dihydroxy-4-oxobutyl)-trimethylazanium chloride
Molecular Formula: C₇H₁₆ClNO₃
Molecular Weight: 197.659840 g/mol
Melting Point: 142 °C
Storage Temp.: −20 °C
Water Solubility: soluble
H-Bond Donor: 2
H-Bond Acceptor: 4
Rotatable Bond Count: 4
Exact Mass: 197.081871
MonoIsotopic Mass: 197.081871
Topological Polar Surface Area: 57.5
Heavy Atom Count: 12 
Canonical SMILES: C[N+](C)(C)CC(CC(=O)O)O.[Cl-]
InChI: InChI=1S/C7H15NO3.ClH/c1-8(2,3)5-6(9)4-7(10)11;/h6,9H,4-5H2,1-3H3;1H
InChIKey: JXXCENBLGFBQJM-UHFFFAOYSA-N
EINECS: 229-663-6
Product Categories: Food & Feed ADDITIVES;Vitamins and derivatives

Hazard Codes: Xi
Risk Statements: 36/37/38
36/37/38: Irritating to eyes, respiratory system and skin  
Safety Statements: 26-37/39
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
37/39: Wear suitable gloves and eye/face protection   
WGK Germany: 2
RTECS: BP2979100
Moderately toxic by intraperitoneal and intravenous routes. An experimental teratogen. Other experimental reproductive effects. When heated to decomposition it emits toxic fumes of NO_x and Cl⁻.

 L(-)-Carnitine hydrochloride (CAS NO.6645-46-1) is also named as (-)-(3-Carboxy-2-hydroxypropyl)trimethylammonium chloride ; (R)-3-Carboxy-2-hydroxy-N,N,N-trimethyl-1-propanaminium chloride ; (R)-Carnitine hydrochloride ; L-Carnitine chloride ; L-Carnitine hydrochloride ; LC-80 ; Levocarnitine chloride ; UNII-J3Y5E6IKS3 ; l-(3-Carboxy-2-hydroxypropyl)trimethylammonium chloride ; l-Carnitine chloride ; l-Carnitine hydrochloride . L(-)-Carnitine hydrochloride (CAS NO.6645-46-1) is white to slightly beige crystalline powder. It is toxic. It will produce toxic nitrogen oxides and hydrogen chloride fumes by heat. So the storage environment should be ventilate, low-temperature and dry.