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Chemical Datasheet
METHYLAMINE, ANHYDROUS |
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Chemical Identifiers
CAS Number |
UN/NA Number |
DOT Hazard Label |
USCG CHRIS Code |
- 74-89-5
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NIOSH Pocket Guide |
International Chem Safety Card |
Methylamine
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- METHYLAMINE
- METHYLAMINE (40% aqueous solution)
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NFPA 704
General Description
A colorless gas or a liquid. Pungent fishy odor resembling odor of ammonia. The liquid boils at 20.3°F hence vaporizes rapidly when unconfined. Vapors are heavier than air and may collect in low-lying areas. Easily ignited under most conditions. Under prolonged exposure to intense heat the containers may rupture violently and rocket. Used for making pharmaceuticals, insecticides, paint removers, surfactants, rubber chemicals.
Hazards
Reactivity Alerts
- Highly Flammable
- Air-Reactive
Air & Water Reactions
Highly flammable. Very soluble in water; the solutions are strongly basic and therefore corrosive. Liquid fumes in air.
Fire Hazard
FLAMMABLE. POISONOUS GASES MAY BE PRODUCED IN FIRE. Containers may explode in fire. Flashback along vapor trail may occur. Vapor may explode if ignited in an enclosed area. Toxic nitrogen oxides may be formed. Vapors are heavier than air and may travel considerable distance to a source of ignition and flash back. (USCG, 1999)
Health Hazard
VAPOR: Irritating to eyes, nose and throat. If inhaled will cause coughing or difficult breathing. LIQUID: Will burn skin and eyes. (USCG, 1999)
Reactivity Profile
METHYLAMINE neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen is generated in combination with strong reducing agents, such as hydrides.
Belongs to the Following Reactive Group(s)
- Amines, Phosphines, and Pyridines
Potentially Incompatible Absorbents
Use caution: Liquids with this reactive group classification have been
known to react with the
absorbent
listed below.
- Mineral-Based & Clay-Based Absorbents
Response Recommendations
Isolation and Evacuation
Excerpt from ERG Guide 118 [Gases - Flammable - Corrosive]:
As an immediate precautionary measure, isolate spill or leak area for at least 100 meters (330 feet) in all directions.
LARGE SPILL: Consider initial downwind evacuation for at least 800 meters (1/2 mile).
FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 1600 meters (1 mile) in all directions; also, consider initial evacuation for 1600 meters (1 mile) in all directions. (ERG, 2016)
Firefighting
Excerpt from ERG Guide 118 [Gases - Flammable - Corrosive]:
DO NOT EXTINGUISH A LEAKING GAS FIRE UNLESS LEAK CAN BE STOPPED.
SMALL FIRE: Dry chemical or CO2.
LARGE FIRE: Water spray, fog or regular foam. Move containers from fire area if you can do it without risk. Damaged cylinders should be handled only by specialists.
FIRE INVOLVING TANKS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Do not direct water at source of leak or safety devices; icing may occur. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. (ERG, 2016)
Non-Fire Response
Excerpt from ERG Guide 118 [Gases - Flammable - Corrosive]:
ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). All equipment used when handling the product must be grounded. Fully encapsulating, vapor-protective clothing should be worn for spills and leaks with no fire. Do not touch or walk through spilled material. Stop leak if you can do it without risk. If possible, turn leaking containers so that gas escapes rather than liquid. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. Do not direct water at spill or source of leak. Isolate area until gas has dispersed. (ERG, 2016)
Protective Clothing
Skin: If chemical is in solution, wear appropriate personal protective clothing to prevent skin contact and to prevent skin from becoming frozen from contact with the liquid or from contact with vessels containing the liquid.
Eyes: If the chemical is in solution, wear appropriate eye protection to prevent eye contact with the liquid that could result in burns or tissue damage from frostbite.
Wash skin: If the chemical is in solution, the worker should immediately wash the skin when it becomes contaminated.
Remove: Work clothing that becomes wet should be immediately removed due to its flammability hazard(i.e. for liquids with flash point < 100°F)
Change: No recommendation is made specifying the need for the worker to change clothing after the work shift.
Provide: Quick drench facilities and/or eyewash fountains should be provided within the immediate work area for emergency use where there is any possibility of exposure to liquids that are extremely cold or rapidly evaporating. (NIOSH, 2016)
DuPont Tychem® Suit Fabrics
Normalized Breakthrough Times (in Minutes)
Chemical |
CAS Number |
State |
QS |
QC |
SL |
C3 |
TF |
TP |
BR |
RC |
TK |
RF |
Methylamine (40% in water) |
74-89-5 |
Liquid |
|
|
|
140 |
|
|
261 |
261 |
261 |
261 |
Methylamine (50% in water) |
74-89-5 |
Liquid |
|
|
|
|
|
|
232 |
232 |
232 |
232 |
Methylamine (>95%) |
74-89-5 |
Vapor |
|
|
|
|
>480 |
>480 |
105 |
105 |
>480 |
105 |
Special Warnings from DuPont
- Serged and bound seams are degraded by some hazardous liquid
chemicals, such as strong acids, and should not be worn when
these chemicals are present.
-
CAUTION: This information is based upon technical data that
DuPont believes to be reliable. It is subject to revision as
additional knowledge and experience are gained. DuPont makes no
guarantee of results and assumes no obligation or liability...
(DuPont, 2018)
First Aid
EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.
SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas.
INHALATION: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing.
INGESTION: DO NOT INDUCE VOMITING. Corrosive chemicals will destroy the membranes of the mouth, throat, and esophagus and volatile chemicals have a high risk of being aspirated into the victim's lungs during vomiting. Thus, the risk of increasing the medical problems by inducing vomiting of a volatile corrosive chemical is very high. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. IMMEDIATELY transport the victim to a hospital. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)
Physical Properties
Flash Point: data unavailable
Lower Explosive Limit (LEL):
4.3 %
(USCG, 1999)
Upper Explosive Limit (UEL):
21 %
(USCG, 1999)
Autoignition Temperature:
806 ° F
(USCG, 1999)
Melting Point:
-134.5 ° F
(USCG, 1999)
Vapor Pressure:
1972.92 mm Hg
at 60 ° F
(USCG, 1999)
Vapor Density (Relative to Air):
1.1
(USCG, 1999)
Specific Gravity:
0.693
at 20.3 ° F
(USCG, 1999)
Boiling Point:
20.3 ° F
at 760 mm Hg
(USCG, 1999)
Molecular Weight:
31.1
(USCG, 1999)
Water Solubility:
greater than or equal to 100 mg/mL
at 70° F
(NTP, 1992)
Ionization Potential:
8.97 eV
(NIOSH, 2016)
IDLH:
100 ppm
(NIOSH, 2016)
AEGLs (Acute Exposure Guideline Levels)
Interim AEGLs for Methyl amine (74-89-5)
Exposure Period |
AEGL-1 |
AEGL-2 |
AEGL-3 |
10 minutes |
15 ppm |
160 ppm |
910 ppm |
30 minutes |
15 ppm |
92 ppm |
510 ppm |
60 minutes |
15 ppm |
64 ppm |
350 ppm |
4 hours |
15 ppm |
31 ppm |
170 ppm |
8 hours |
15 ppm |
21 ppm |
110 ppm |
(NAC/NRC, 2017)
ERPGs (Emergency Response Planning Guidelines)
Chemical |
ERPG-1 |
ERPG-2 |
ERPG-3 |
Monomethylamine (74-89-5)
|
10 ppm  |
100 ppm |
500 ppm |
(AIHA, 2016)
PACs (Protective Action Criteria)
Chemical |
PAC-1 |
PAC-2 |
PAC-3 |
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Monomethylamine; (Methylamine) (74-89-5)
|
15 ppm |
64 ppm |
350 ppm |
LEL = 49000 ppm |
(DOE, 2016)
Regulatory Information
EPA Consolidated List of Lists
Regulatory Name |
CAS Number/ 313 Category Code |
EPCRA 302 EHS TPQ |
EPCRA 304 EHS RQ |
CERCLA RQ |
EPCRA 313 TRI |
RCRA Code |
CAA 112(r) RMP TQ |
Methanamine |
74-89-5 |
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100 pounds |
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10000 pounds |
Monomethylamine |
74-89-5 |
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100 pounds |
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10000 pounds |
(EPA List of Lists, 2015)
DHS Chemical Facility Anti-Terrorism Standards (CFATS)
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RELEASE |
THEFT |
SABOTAGE |
Chemical of Interest |
CAS Number |
Min Conc |
STQ |
Security Issue |
Min Conc |
STQ |
Security Issue |
Min Conc |
STQ |
Security Issue |
Methylamine; [Methanamine] |
74-89-5 |
1.00 % |
10000 pounds |
flammable |
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(DHS, 2007)
OSHA Process Safety Management (PSM) Standard List
Chemical Name |
CAS Number |
Threshold Quantity (TQ) |
Methylamine, Anhydrous |
74-89-5 |
1000 pounds |
(OSHA, 2011)
Alternate Chemical Names
- AMINOMETHANE
- CARBINAMINE
- MERCURIALIN
- METHANAMINE
- METHYLAMINE
- METHYLAMINE (ANHYDROUS)
- METHYLAMINE (AQUEOUS)
- METHYLAMINE, ANHYDROUS
- METHYLAMINE, [ANHYDROUS]
- MONOMETHYLAMINE