Name:
Tetramethylammonium hydroxide 25% in methanol
Synonym:
TMAH in MeOH
CAS:
67-56-1
Section 1 - Chemical Product
MSDS Name:Tetramethylammonium hydroxide 25% in methanol
Synonym:TMAH in MeOH
Synonym:TMAH in MeOH
Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
| CAS# | Chemical Name | emsds | EINECS# |
| 67-56-1 | Methyl alcohol | 75 | 200-659-6 |
| Hazard Symbols: T F C Risk Phrases: 11 23/25 34 |
Section 3 - HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW
Highly flammable. Toxic by inhalation and if swallowed. Causes burns.
Potential Health Effects
Eye:
Causes eye burns. Vapors may cause eye irritation. May cause painful sensitization to light.
Skin:
Causes skin burns. Prolonged and/or repeated contact may cause defatting of the skin and dermatitis. May be absorbed through the skin.
Ingestion:
May be fatal or cause blindness if swallowed. May cause kidney damage. May cause systemic toxicity with acidosis. May cause central nervous system depression, characterized by excitement, followed by headache, dizziness, drowsiness, and nausea. Advanced stages may cause collapse, unconsciousness, coma and possible death due to respiratory failure. Causes severe digestive tract burns with abdominal pain, vomiting, and possible death.
Inhalation:
Causes chemical burns to the respiratory tract. May cause visual impairment and possible permanent blindness. May cause effects similar to those described for ingestion. Exposure produces central nervous system depression.
Chronic:
Prolonged or repeated skin contact may cause dermatitis. Chronic inhalation and ingestion may cause effects similar to those of acute inhalation and ingestion. May cause fetal effects.
Highly flammable. Toxic by inhalation and if swallowed. Causes burns.
Potential Health Effects
Eye:
Causes eye burns. Vapors may cause eye irritation. May cause painful sensitization to light.
Skin:
Causes skin burns. Prolonged and/or repeated contact may cause defatting of the skin and dermatitis. May be absorbed through the skin.
Ingestion:
May be fatal or cause blindness if swallowed. May cause kidney damage. May cause systemic toxicity with acidosis. May cause central nervous system depression, characterized by excitement, followed by headache, dizziness, drowsiness, and nausea. Advanced stages may cause collapse, unconsciousness, coma and possible death due to respiratory failure. Causes severe digestive tract burns with abdominal pain, vomiting, and possible death.
Inhalation:
Causes chemical burns to the respiratory tract. May cause visual impairment and possible permanent blindness. May cause effects similar to those described for ingestion. Exposure produces central nervous system depression.
Chronic:
Prolonged or repeated skin contact may cause dermatitis. Chronic inhalation and ingestion may cause effects similar to those of acute inhalation and ingestion. May cause fetal effects.
Section 4 - FIRST AID MEASURES
Eyes: Get medical aid immediately. Do NOT allow victim to rub eyes or keep eyes closed. Extensive irrigation with water is required (at least 30 minutes).
Skin:
Get medical aid immediately. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Discard contaminated clothing in a manner which limits further exposure.
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 and move to fresh air immediately. If breathing is difficult, give oxygen. Do NOT use mouth-to-mouth resuscitation. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
Notes to Physician:
Effects may be delayed. Ethanol may inhibit methanol metabolism.
Antidote: Ethanol may inhibit methanol metabolism.
Skin:
Get medical aid immediately. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Discard contaminated clothing in a manner which limits further exposure.
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 and move to fresh air immediately. If breathing is difficult, give oxygen. Do NOT use mouth-to-mouth resuscitation. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
Notes to Physician:
Effects may be delayed. Ethanol may inhibit methanol metabolism.
Antidote: Ethanol may inhibit methanol metabolism.
Section 5 - FIRE FIGHTING MEASURES
General Information:
Containers can build up pressure if exposed to heat and/or fire. As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors may form an explosive mixture with air.
Vapors can travel to a source of ignition and flash back. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Will burn if involved in a fire.
Flammable liquid and vapor. Vapors may be heavier than air. They can spread along the ground and collect in low or confined areas.
May be ignited by heat, sparks, and flame. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
Extinguishing Media:
Water may be ineffective. Do NOT get water inside containers. For small fires, use dry chemical, carbon dioxide, or water spray. For large fires, use dry chemical, carbon dioxide, alcohol-resistant foam, or water spray. Cool containers with flooding quantities of water until well after fire is out.
Containers can build up pressure if exposed to heat and/or fire. As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors may form an explosive mixture with air.
Vapors can travel to a source of ignition and flash back. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Will burn if involved in a fire.
Flammable liquid and vapor. Vapors may be heavier than air. They can spread along the ground and collect in low or confined areas.
May be ignited by heat, sparks, and flame. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
Extinguishing Media:
Water may be ineffective. Do NOT get water inside containers. For small fires, use dry chemical, carbon dioxide, or water spray. For large fires, use dry chemical, carbon dioxide, alcohol-resistant foam, or water spray. Cool containers with flooding quantities of water until well after fire is out.
Section 6 - ACCIDENTAL RELEASE MEASURES
General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, observing precautions in the Protective Equipment section. Remove all sources of ignition. Provide ventilation. Do not get water inside containers. A vapor suppressing foam may be used to reduce vapors.
Water spray may reduce vapor but may not prevent ignition in closed spaces.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, observing precautions in the Protective Equipment section. Remove all sources of ignition. Provide ventilation. Do not get water inside containers. A vapor suppressing foam may be used to reduce vapors.
Water spray may reduce vapor but may not prevent ignition in closed spaces.
Section 7 - HANDLING and STORAGE
Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Ground and bond containers when transferring material. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Keep away from heat, sparks and flame. Do not ingest or inhale. Use only in a chemical fume hood.
Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Storage:
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Do not store in metal containers.
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Ground and bond containers when transferring material. Do not get in eyes, on skin, or on clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Keep away from heat, sparks and flame. Do not ingest or inhale. Use only in a chemical fume hood.
Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Storage:
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Do not store in metal containers.
Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate general or local exhaust ventilation to keep airborne concentrations below the permissible exposure limits. Use only under a chemical fume hood.
Exposure Limits CAS# 67-56-1: United Kingdom, WEL - TWA: 200 ppm TWA; 266 mg/m3 TWA United Kingdom, WEL - STEL: 250 ppm STEL; 333 mg/m3 STEL United States OSHA: 200 ppm TWA; 260 mg/m3 TWA Belgium - TWA: 200 ppm VLE; 266 mg/m3 VLE Belgium - STEL: 250 ppm VLE; 333 mg/m3 VLE France - VME: 200 ppm VME; 260 mg/m3 VME France - VLE: 1000 ppm VLE; 1300 mg/m3 VLE Germany: 200 ppm TWA; 270 mg/m3 TWA Germany: Skin absorber Japan: 200 ppm OEL; 260 mg/m3 OEL Malaysia: 200 ppm TWA; 262 mg/m3 TWA Netherlands: 200 ppm MAC; 260 mg/m3 MAC Russia: 5 mg/m3 TWA Spain: 200 ppm VLA-ED; 266 mg/m3 VLA-ED Spain: 250 ppm VLA-EC; 333 mg/m3 VLA-EC CAS# 75-59-2: Personal Protective Equipment Eyes: Wear chemical splash goggles and face shield.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate general or local exhaust ventilation to keep airborne concentrations below the permissible exposure limits. Use only under a chemical fume hood.
Exposure Limits CAS# 67-56-1: United Kingdom, WEL - TWA: 200 ppm TWA; 266 mg/m3 TWA United Kingdom, WEL - STEL: 250 ppm STEL; 333 mg/m3 STEL United States OSHA: 200 ppm TWA; 260 mg/m3 TWA Belgium - TWA: 200 ppm VLE; 266 mg/m3 VLE Belgium - STEL: 250 ppm VLE; 333 mg/m3 VLE France - VME: 200 ppm VME; 260 mg/m3 VME France - VLE: 1000 ppm VLE; 1300 mg/m3 VLE Germany: 200 ppm TWA; 270 mg/m3 TWA Germany: Skin absorber Japan: 200 ppm OEL; 260 mg/m3 OEL Malaysia: 200 ppm TWA; 262 mg/m3 TWA Netherlands: 200 ppm MAC; 260 mg/m3 MAC Russia: 5 mg/m3 TWA Spain: 200 ppm VLA-ED; 266 mg/m3 VLA-ED Spain: 250 ppm VLA-EC; 333 mg/m3 VLA-EC CAS# 75-59-2: Personal Protective Equipment Eyes: Wear chemical splash goggles and face shield.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.
Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
Physical State: Liquid
Color: colorless
Odor: Alcohol-like.
pH: Not available.
Vapor Pressure: 29 mm Hg
Viscosity: 0.006 P @ 68 deg F
Boiling Point: 147 deg F
Freezing/Melting Point: -144 deg F
Autoignition Temperature: Not available.
Flash Point: 6 deg C ( 42.80 deg F)
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water: Soluble.
Specific Gravity/Density: 0.8
Molecular Formula: Mixture
Molecular Weight: 0
Section 10 - STABILITY AND REACTIVITY
Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
High temperatures, ignition sources.
Incompatibilities with Other Materials:
Strong oxidizing agents, strong acids.
Hazardous Decomposition Products:
Nitrogen oxides, carbon monoxide, carbon dioxide, formaldehyde, ammonia, amines.
Hazardous Polymerization: Has not been reported.
Stable under normal temperatures and pressures.
Conditions to Avoid:
High temperatures, ignition sources.
Incompatibilities with Other Materials:
Strong oxidizing agents, strong acids.
Hazardous Decomposition Products:
Nitrogen oxides, carbon monoxide, carbon dioxide, formaldehyde, ammonia, amines.
Hazardous Polymerization: Has not been reported.
Section 11 - TOXICOLOGICAL INFORMATION
RTECS#:
CAS# 67-56-1: PC1400000 CAS# 75-59-2: PA0875000 LD50/LC50:
CAS# 67-56-1: Draize test, rabbit, eye: 40 mg Moderate; Draize test, rabbit, eye: 100 mg/24H Moderate; Draize test, rabbit, skin: 20 mg/24H Moderate; Inhalation, rabbit: LC50 = 81000 mg/m3/14H; Inhalation, rat: LC50 = 64000 ppm/4H; Oral, mouse: LD50 = 7300 mg/kg; Oral, rabbit: LD50 = 14200 mg/kg; Oral, rat: LD50 = 5600 mg/kg; Skin, rabbit: LD50 = 15800 mg/kg.
CAS# 75-59-2: Dermal, guinea pig: LD50 = 25 mg/kg.
Not available.
Carcinogenicity:
Methyl alcohol - Not listed by ACGIH, IARC, or NTP.
Tetramethylammonium hydroxide, anhydrous - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.
CAS# 67-56-1: PC1400000 CAS# 75-59-2: PA0875000 LD50/LC50:
CAS# 67-56-1: Draize test, rabbit, eye: 40 mg Moderate; Draize test, rabbit, eye: 100 mg/24H Moderate; Draize test, rabbit, skin: 20 mg/24H Moderate; Inhalation, rabbit: LC50 = 81000 mg/m3/14H; Inhalation, rat: LC50 = 64000 ppm/4H; Oral, mouse: LD50 = 7300 mg/kg; Oral, rabbit: LD50 = 14200 mg/kg; Oral, rat: LD50 = 5600 mg/kg; Skin, rabbit: LD50 = 15800 mg/kg.
CAS# 75-59-2: Dermal, guinea pig: LD50 = 25 mg/kg.
Not available.
Carcinogenicity:
Methyl alcohol - Not listed by ACGIH, IARC, or NTP.
Tetramethylammonium hydroxide, anhydrous - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.
Section 12 - ECOLOGICAL INFORMATION
Other No information available.
Section 13 - DISPOSAL CONSIDERATIONS
Dispose of in a manner consistent with federal, state, and local regulations.
Section 14 - TRANSPORT INFORMATION
IATA
Shipping Name: FLAMMABLE LIQUID, TOXIC, CORROSIVE, N.O.S.*
Hazard Class: 3 (6.1)
UN Number: 3286
Packing Group: II
IMO
Shipping Name: FLAMMABLE LIQUID, TOXIC, CORROSIVE, N.O.S.
Hazard Class: 3.1 (6.1)
UN Number: 3286
Packing Group: II
RID/ADR
Shipping Name: FLAMMABLE LIQUID, TOXIC, CORROSIVE, N.O.S.
Hazard Class: 3
UN Number: 3286
Packing group: II
USA RQ: CAS# 67-56-1: 5000 lb final RQ; 2270 kg final RQ
Section 15 - REGULATORY INFORMATION
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T F C
Risk Phrases:
R 11 Highly flammable.
R 23/25 Toxic by inhalation and if swallowed.
R 34 Causes burns.
Safety Phrases:
S 7 Keep container tightly closed.
S 16 Keep away from sources of ignition - No
smoking.
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 28B After contact with skin, wash immediately with
plenty of water and soap.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
WGK (Water Danger/Protection)
CAS# 67-56-1: 1
CAS# 75-59-2: No information available.
Canada
CAS# 67-56-1 is listed on Canadas DSL List.
CAS# 75-59-2 is listed on Canadas DSL List.
CAS# 67-56-1 is listed on Canadas Ingredient Disclosure List.
CAS# 75-59-2 is listed on Canadas Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 67-56-1 is listed on the TSCA inventory.
CAS# 75-59-2 is listed on the TSCA inventory.
