2-Methyl-5-ethylpyridine

  • 5-Ethyl-2-picoline
  • 5-Ethyl-2-methylpyridine
Formula
C8H11N
Structure
Description
A colorless to yellow liquid.
Uses
Manufacture nicotinic acid & nicotinamide, vinyl pyridines for copolymers, intermediate for germicides & textile finishes, corrosion inhibitor for chlorinated solvents.

Registry Numbers and Inventories.
CAS
104-90-5
EC (EINECS/ELINCS)
203-250-0
R 20/21/22 34
S 26 36/37/39 45
RTECS
TJ6825000
RTECS class
Mutagen; Primary Irritant
UN (DOT)
2300
Merck
13,3876
Beilstein/Gmelin
109269
Beilstein Reference
5-20-06-00086
RCRA
U191
Swiss Giftliste 1
G-8520
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C8H11N
Formula mass
121.18
Melting point, °C
-71
Boiling point, °C
178
Vapor pressure, mmHg
1.4 (25 C)
Vapor density (air=1)
4.2
Odor Threshold Odor threshold 0.03 mg/m3
Critical temperature
396
Critical pressure
35.4
Density
0.9187 g/cm3
Solubility in water
Insoluble
Viscosity
0.70 cp (80 C)
Surface tension
36 g/s2
Refractive index
1.497 (20 C)
Dielectric constant
7.95 (22 C)
Partition coefficient, pKow
2.49

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Keep from contact with oxidizing materials. Store in a cool, dry, well-ventilated area away from incompatible substances. Corrosives area. Store protected from moisture. Do not store in copper or copper alloy storage vessels.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not get on skin or in eyes. Do not ingest or inhale. Discard contaminated shoes. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Rubber and plastic gloves should not be relied upon to prevent skin contact. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Use water spray to disperse the gas/vapor. Remove all sources of ignition. Provide ventilation. Stop leak only if you can do so without risk.
Stability
Volatile in steam.
Incompatibilities
Strong oxidizing agents, acids, strong bases, chloroformates, acid chlorides, moisture.
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide, nitrogen.

Fire.
Flash Point,°C
66
Autoignition, °C
504
Upper exp. limit, %
6.6
Lower exp. limit, %
1.1
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Water runoff can cause environmental damage. Dike and collect water used to fight fire. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Water may be ineffective. Material is lighter than water and a fire may be spread by the use of water. Combustible Liquid. Extinguishing media: This material is lighter than water and insoluble in water. The fire could easily be spread by the use of water in an area where the water cannot be contained. Do NOT get water inside containers. Cool containers with flooding quantities of water until well after fire is out. In case of fire use water spray, dry chemical or carbon dioxide.
Fire potential
Flammable. Combustion with moderate heating.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
Irritating vapors are generated when heated
Health
3
 
Flammability
2
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OEL-RUSSIA:STEL 2 mg/m3;Skin
Poison_Class
4
Exposure effects
Laboratory experiments have resulted in mutagenic effects.
   Ingestion
Harmful if swallowed. May cause burns to the digestive tract. Ingestion may cause weakness, ataxia, diarrhea, and unconsciousness.
   Inhalation
Causes respiratory tract irritation. May cause burns to the respiratory tract.
   Skin
Harmful if absorbed through the skin. Causes severe skin irritation and possible burns.
   Eyes
Causes severe eye irritation and possible burns.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
2300
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
MEP
 
9 Aromatic amines
Std. Transport #
4925143
 
IMO Pollution Category
B
IMO Hazard code
S/P