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305-84-0

Basic Information
CAS No.: 305-84-0
Name: L-Carnosine
Molecular Structure:
Molecular Structure of 305-84-0 (L-Carnosine)
Formula: C9H14N4O3
Molecular Weight: 226.27
Synonyms: beta-Alanyl-L-histidine;L-Carnosine 99% min.;N-2-M;L-Carnosinc;β-Alanyl-L-histidine;L-Carnosine Acetate;Karnozin;2-(3-aminopropanoylamino)-3-(3H-imidazol-4-yl)propanoic acid;L-Histidine, N-.beta.-alanyl-;Nalpha-(beta-alanyl)-L-histidine;(2S)-2-(3-aminopropanoylamino)-3-(3H-imidazol-4-yl)propanoic acid;.beta.-Alanyl-L-histidine;Ignotine;
EINECS: 206-169-9
Density: 1.41 g/cm3
Melting Point: 253 °C (dec.)(lit.)
Boiling Point: 511.7 °C at 760 mmHg
Flash Point: 263.3 °C
Solubility: almost transparency
Appearance: crystalline
Hazard Symbols: HarmfulXn
Risk Codes: 20/21/22-36/37/38
Safety: 24/25-36-26
Transport Information:
PSA: 121.10000
LogP: -0.03840
Downstream Products
107-95-9
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Chemistry

Product Name: L-Carnosine
Synonyms: l-Ignotine ; l-Beta-alanine histidine ; Beta-alanyl-l-histidine ; Beta-ala-l-his ; L-Carnosine ; b-Alanyl-l-histidine ; Beta-a-h ; h-Beta-ala-his-oh 
IUPAC Name:  2-(3-aminopropanoylamino)-3-(1H-imidazol-5-yl)propanoic acid
The Molecular formula of  Carnosine (136572-09-3): C9H14N4O3
The Molecular Weight of  Carnosine (136572-09-3): 226.23 g/mol
Molecular Structure : 
EINECS: 206-169-9
Melting point: 253 °C (dec.)(lit.)
alpha: 20.9 o (c=1.5, H2O)
storage temp.:  2-8°C
Appearance: Crystalline
Density: 1.41 g/cm3
Flash Point: 263.3 °C
Index of Refraction: 1.607
Surface Tension: 76.9 dyne/cm
Enthalpy of Vaporization: 82.42 kJ/mol
Boiling Point: 511.7 °C at 760 mmHg
Vapour Pressure: 2.69E-11 mmHg at 25 °C
 

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal 9087mg/kg (9087mg/kg) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)
BEHAVIORAL: MUSCLE CONTRACTION OR SPASTICITY)
LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION
United States Patent Document. Vol. #4446149,
mouse LD50 oral > 14930mg/kg (14930mg/kg) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)
BEHAVIORAL: MUSCLE CONTRACTION OR SPASTICITY)
LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION
United States Patent Document. Vol. #4446149,
LD50/LC50: RTECS:
CAS# 305-84-0: Oral, mouse: LD50 = >14930 mg/kg;
Carcinogenicity: L-Carnosine - Not listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65.
Other: The toxicological properties have not been fully investigated. See actual entry in RTECS for complete information.
 

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Mildly toxic by intraperitoneal route. An experimental teratogen. Other experimental reproductive effects. When heated to decomposition it emits toxic fumes of NOx.
The Hazard Codes of CARNOSINE(305-84-0):   Xn
The Risk Statements information of Carnosine (305-84-0): 20/21/22-36/37/38
20/21/22:  Harmful by inhalation, in contact with skin and if swallowed 
36/37/38:  Irritating to eyes, respiratory system and skin 
The Safety Statements information of Carnosine (305-84-0): 24/25-36-26
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
36:  Wear suitable protective clothing 
24/25:  Avoid contact with skin and eyes 
WGK Germany: 2
RTECS: MS3080000
F: 3-10

Specification

Chemical Stability: Stable under normal temperatures and pressures.
Conditions to Avoid: Incompatible materials.
Incompatibilities with Other Materials Strong oxidizing agents.
Hazardous Decomposition Products Carbon monoxide, carbon dioxide, nitrogen oxides (NOx) and ammonia (NH3).
Hazardous Polymerization Will not occur.
 

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