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91-57-6

Basic Information
CAS No.: 91-57-6
Name: 2-Methylnaphthalene
Article Data: 332
Molecular Structure:
Molecular Structure of 91-57-6 (2-Methylnaphthalene)
Formula: C11H10
Molecular Weight: 142.2
Synonyms: NSC 3575;b-Methylnaphthalene;
EINECS: 202-078-3
Density: 1.016 g/cm3
Melting Point: 34-36 °C(lit.)
Boiling Point: 239.9 °C at 760 mmHg
Flash Point: 97.8 °C
Solubility: 0.00246 g/100 mL in water
Appearance: White crystalline solid
Hazard Symbols: HarmfulXn, DangerousN, ToxicT
Risk Codes: 22-36/37/38-51/53-63-43-23/24/25-45-20/21/22
Safety: 26-37/39-61-36/37-24/25-23-53-36
Transport Information: UN 3077 9/PG 3
PSA: 0.00000
LogP: 3.14820
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Chemistry

Molecular formula: C11H10
Molar mass: 142.2
EINECS: 202-078-3
Melting point: 34-36 °C
Boiling point: 241-242 °C
Flash point: 208 °F
FreezingPoint: 34.5 °C
density: 1.01
refractive index: 1.6019
storage temp.: 2-8°C
Water Solubility: 0.00246 g/100 mL
The Structure of 2-METHYLNAPHTHALENE(91-57-6):

Uses

2-METHYLNAPHTHALENE(91-57-6) is the raw material for production of vitamin K3, it is also used for production of oral contraceptives, and synthesis of plant growth inhibitors.
2-METHYLNAPHTHALENE(91-57-6) is also used as surfactants, water-reducer, dispersant, etc.

Toxicity Data With Reference

1.   

cyt-hmn:lym 4 mmol/L

   MUREAV    Mutation Research. 208 (1988),155.
2.   

sce-hmn:lym 250 µmol/L

   MUREAV    Mutation Research. 208 (1988),155.
3.   

orl-rat LD50:1630 mg/kg

   85GMAT    Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure Izmerov, N.F., et al.,Moscow, USSR.: Centre of International Projects, GKNT,1982,85.
4.   

ipr-mus LDLo:1000 mg/kg

   TXAPA9    Toxicology and Applied Pharmacology. 61 (1981),185.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Moderately toxic by ingestion and intraperitoneal routes. Human mutation data reported. When heated to decomposition it emits acrid smoke and irritating fumes. See also METHYLNAPHTHALENE; 1-METHYLNAPHTHALENE.
Hazard Codes: Xn,N,T
Risk Statements: 22-36/37/38-51/53-63-43-23/24/25-45-20/21/22
22:  Harmful if swallowed 
36/37/38:  Irritating to eyes, respiratory system and skin 
51/53:  Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment
63:  Possible risk of harm to the unborn child 
43:  May cause sensitization by skin contact 
23/24/25:  Toxic by inhalation, in contact with skin and if swallowed 
45:  May cause cancer 
20/21/22:  Harmful by inhalation, in contact with skin and if swallowed 
Safety Statements: 26-37/39-61-36/37-24/25-23-53-36
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 
61:  Avoid release to the environment. Refer to special instructions safety data sheet 
36/37:  Wear suitable protective clothing and gloves 
24/25:  Avoid contact with skin and eyes 
23:  Do not breathe gas/fumes/vapor/spray (appropriate wording to be specified by the manufacturer) 
53:  Avoid exposure - obtain special instruction before use 
36:  Wear suitable protective clothing
RIDADR: UN 3077 9/PG 3
WGK Germany: 2
RTECS: QJ9635000
HazardClass: 9
PackingGroup: III
HS Code: 29029080