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    Tetramethylammonium hydroxide
    CAS No.: 75-59-2 Formula: C4H13NO Molecular Weight: 91.15210
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    Tetramethylammonium hydroxide

    CAS No.: 75-59-2 Formula: C4H13NO Molecular Weight: 91.15210
    Suppliers: All (65) China Suppliers (65) Price Available (14) Contractor (7)

    Description

    Tetramethylammonium hydroxide (TMAH or TMAOH) is a quaternary ammonium salt with the molecular formula N(CH3)4+?OH?, and is one of the simplest members of this class of organic compounds. This substance is known in a (relatively) stable solid form only as the pentahydrate. Commercially, the forms in which TMAH is most commonly encountered are as concentrated solutions in water or methanol. The solid and solutions are colorless, or yellowish if impure. Although TMAH has virtually no odor when pure, samples often have a strongly fishy smell from the trimethylamine which is commonly present as an impurity. TMAH has numerous and diverse industrial and research applications (see below).

    Basic Info

    Chemical Name Tetramethylammonium hydroxide
    Synonyms

    AR-300-49; tetreamethyl ammonium hydroxide; nmw-w; AZ-726; TMAH; TRITONNE; Developer; ocg945; TMNOH; nmd3; AZ-300MIF; Expand

    CAS No. 75-59-2
    Molecular Formula C4H13NO
    Molecular Weight 91.15210
    PSA 23.06000
    LogP 0.14560

    Numbering system

    UNII 5GKP7317Q2

    Properties

    Appearance & Physical State colourless to yellow liquid
    Density 1.016 (25% aq.)
    Boiling Point 110oC
    Melting Point °C
    Flash Point 6oC
    Refractive Index 1.3806
    Stability Stable. Flammable. Incompatible with strong oxidizing agents, strong acids.
    Storage Condition 2-8°C
    Vapor Pressure 17.5 mm Hg ( 20 °C)

    Safety Info

    RTECS PA0875000
    Hazard Class 3
    Safety Statements S26-S36/37/39-S45
    HS Code 2923900090
    WGK Germany 1
    Packing Group II
    RIDADR UN 3286 3/PG 2
    Risk Statements R20/21/22; R34
    Hazard Codes T; C
    Signal Word Danger
    Symbol GHS05, GHS06, GHS08, GHS09
    Caution Statement P260; P280; P301 + P310 + P330; P303 + P361 + P353; P304 + P340 + P310; P305 + P351 + P338; P308 + P311
    Hazard Declaration H300 + H310; H314; H370; H372; H411
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    SAFETY DATA SHEETS

    According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

    Version: 1.0

    Creation Date: Aug 12, 2017

    Revision Date: Aug 12, 2017

    1.Identification

    1.1 GHS Product identifier

    Product name Tetramethylammonium hydroxide

    1.2 Other means of identification

    Product number -
    Other names tetreamethyl ammonium hydroxide

    1.3 Recommended use of the chemical and restrictions on use

    Identified uses For industry use only.
    Uses advised against no data available

    1.4 Supplier's details

    Company MOLBASE (Shanghai) Biotechnology Co., Ltd.
    Address Floor 4 & 5, Building 12, No. 1001 North Qinzhou Road,
    Xuhui District, Shanghai, China
    Telephone +86(21)64956998
    Fax +86(21)54365166

    1.5 Emergency phone number

    Emergency phone number +86-400-6021-666
    Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

    2.Hazard identification

    2.1 Classification of the substance or mixture

    Acute toxicity - Oral, Category 2

    Acute toxicity - Dermal, Category 1

    Skin corrosion, Category 1B

    Serious eye damage, Category 1

    Specific target organ toxicity – single exposure, Category 1

    Specific target organ toxicity – repeated exposure, Category 1

    Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 2

    2.2 GHS label elements, including precautionary statements

    Pictogram(s)
    Signal word

    Danger

    Hazard statement(s)

    H300 Fatal if swallowed

    H310 Fatal in contact with skin

    H314 Causes severe skin burns and eye damage

    H370 Causes damage to organs

    H372 Causes damage to organs through prolonged or repeated exposure

    H411 Toxic to aquatic life with long lasting effects

    Precautionary statement(s)
    Prevention

    P264 Wash ... thoroughly after handling.

    P270 Do not eat, drink or smoke when using this product.

    P262 Do not get in eyes, on skin, or on clothing.

    P280 Wear protective gloves/protective clothing/eye protection/face protection.

    P260 Do not breathe dust/fume/gas/mist/vapours/spray.

    P273 Avoid release to the environment.

    Response

    P301+P310 IF SWALLOWED: Immediately call a POISON CENTER/doctor/…

    P321 Specific treatment (see ... on this label).

    P330 Rinse mouth.

    P302+P352 IF ON SKIN: Wash with plenty of water/...

    P310 Immediately call a POISON CENTER/doctor/…

    P361+P364 Take off immediately all contaminated clothing and wash it before reuse.

    P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

    P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower].

    P363 Wash contaminated clothing before reuse.

    P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.

    P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

    P308+P311 IF exposed or concerned: Call a POISON CENTER/doctor/...

    P314 Get medical advice/attention if you feel unwell.

    P391 Collect spillage.

    Storage

    P405 Store locked up.

    Disposal

    P501 Dispose of contents/container to ...

    2.3 Other hazards which do not result in classification

    none

    3.Composition/information on ingredients

    3.1 Substances

    Chemical name Common names and synonyms CAS number EC number Concentration
    Tetramethylammonium hydroxide Tetramethylammonium hydroxide 75-59-2 none 100%

    4.First-aid measures

    4.1 Description of necessary first-aid measures

    General advice

    Consult a physician. Show this safety data sheet to the doctor in attendance.

    If inhaled

    If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician.

    In case of skin contact

    Wash off with soap and plenty of water. Consult a physician.

    In case of eye contact

    Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.

    If swallowed

    Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.

    4.2 Most important symptoms/effects, acute and delayed

    no data available

    4.3 Indication of immediate medical attention and special treatment needed, if necessary

    no data available

    5.Fire-fighting measures

    5.1 Extinguishing media

    Suitable extinguishing media

    Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.

    5.2 Specific hazards arising from the chemical

    no data available

    5.3 Special protective actions for fire-fighters

    Wear self-contained breathing apparatus for firefighting if necessary.

    6.Accidental release measures

    6.1 Personal precautions, protective equipment and emergency procedures

    Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8.

    6.2 Environmental precautions

    Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided.

    6.3 Methods and materials for containment and cleaning up

    Pick up and arrange disposal. Sweep up and shovel. Keep in suitable, closed containers for disposal.

    7.Handling and storage

    7.1 Precautions for safe handling

    Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Avoid exposure - obtain special instructions before use.Provide appropriate exhaust ventilation at places where dust is formed. For precautions see section 2.2.

    7.2 Conditions for safe storage, including any incompatibilities

    Store in cool place. Keep container tightly closed in a dry and well-ventilated place.

    8.Exposure controls/personal protection

    8.1 Control parameters

    Occupational Exposure limit values

    no data available

    Biological limit values

    no data available

    8.2 Appropriate engineering controls

    Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday.

    8.3 Individual protection measures, such as personal protective equipment (PPE)

    Eye/face protection

    Safety glasses with side-shields conforming to EN166. Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).

    Skin protection

    Wear impervious clothing. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique(without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it.

    Respiratory protection

    Wear dust mask when handling large quantities.

    Thermal hazards

    no data available

    9.Physical and chemical properties

    Physical state colourless to yellow liquid
    Colour no data available
    Odour no data available
    Melting point/ freezing point 208°C(dec.)(lit.)
    Boiling point or initial boiling point and boiling range 100°C
    Flammability no data available
    Lower and upper explosion limit / flammability limit no data available
    Flash point 27°C
    Auto-ignition temperature no data available
    Decomposition temperature no data available
    pH no data available
    Kinematic viscosity no data available
    Solubility no data available
    Partition coefficient n-octanol/water (log value) no data available
    Vapour pressure 17.5 mm Hg ( 20 °C)
    Density and/or relative density 0.866g/mLat 25°C
    Relative vapour density no data available
    Particle characteristics no data available

    10.Stability and reactivity

    10.1 Reactivity

    no data available

    10.2 Chemical stability

    Stable under recommended storage conditions.

    10.3 Possibility of hazardous reactions

    no data available

    10.4 Conditions to avoid

    no data available

    10.5 Incompatible materials

    no data available

    10.6 Hazardous decomposition products

    no data available

    11.Toxicological information

    Acute toxicity

    • Oral: no data available
    • Inhalation: no data available
    • Dermal: no data available

    Skin corrosion/irritation

    no data available

    Serious eye damage/irritation

    no data available

    Respiratory or skin sensitization

    no data available

    Germ cell mutagenicity

    no data available

    Carcinogenicity

    no data available

    Reproductive toxicity

    no data available

    STOT-single exposure

    no data available

    STOT-repeated exposure

    no data available

    Aspiration hazard

    no data available

    12.Ecological information

    12.1 Toxicity

    • Toxicity to fish: no data available
    • Toxicity to daphnia and other aquatic invertebrates: no data available
    • Toxicity to algae: no data available
    • Toxicity to microorganisms: no data available

    12.2 Persistence and degradability

    no data available

    12.3 Bioaccumulative potential

    no data available

    12.4 Mobility in soil

    no data available

    12.5 Other adverse effects

    no data available

    13.Disposal considerations

    13.1 Disposal methods

    Product

    The material can be disposed of by removal to a licensed chemical destruction plant or by controlled incineration with flue gas scrubbing. Do not contaminate water, foodstuffs, feed or seed by storage or disposal. Do not discharge to sewer systems.

    Contaminated packaging

    Containers can be triply rinsed (or equivalent) and offered for recycling or reconditioning. Alternatively, the packaging can be punctured to make it unusable for other purposes and then be disposed of in a sanitary landfill. Controlled incineration with flue gas scrubbing is possible for combustible packaging materials.

    14.Transport information

    14.1 UN Number

    ADR/RID: UN2920 IMDG: UN2920 IATA: UN2920

    14.2 UN Proper Shipping Name

    ADR/RID: CORROSIVE LIQUID, FLAMMABLE, N.O.S.
    IMDG: CORROSIVE LIQUID, FLAMMABLE, N.O.S.
    IATA: CORROSIVE LIQUID, FLAMMABLE, N.O.S.

    14.3 Transport hazard class(es)

    ADR/RID: 3 IMDG: 3 IATA: 3

    14.4 Packing group, if applicable

    ADR/RID: II IMDG: II IATA: II

    14.5 Environmental hazards

    ADR/RID: yes IMDG: yes IATA: yes

    14.6 Special precautions for user

    no data available

    14.7 Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code

    no data available

    15.Regulatory information

    15.1 Safety, health and environmental regulations specific for the product in question

    Chemical name Common names and synonyms CAS number EC number
    Tetramethylammonium hydroxide Tetramethylammonium hydroxide 75-59-2 none
    European Inventory of Existing Commercial Chemical Substances (EINECS) Listed.
    EC Inventory Listed.
    United States Toxic Substances Control Act (TSCA) Inventory Listed.
    China Catalog of Hazardous chemicals 2015 Listed.
    New Zealand Inventory of Chemicals (NZIoC) Listed.
    Philippines Inventory of Chemicals and Chemical Substances (PICCS) Listed.
    Vietnam National Chemical Inventory Listed.
    Chinese Chemical Inventory of Existing Chemical Substances (China IECSC) Listed.

    16.Other information

    Information on revision

    Creation Date Aug 12, 2017
    Revision Date Aug 12, 2017

    Abbreviations and acronyms

    • CAS: Chemical Abstracts Service
    • ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
    • RID: Regulation concerning the International Carriage of Dangerous Goods by Rail
    • IMDG: International Maritime Dangerous Goods
    • IATA: International Air Transportation Association
    • TWA: Time Weighted Average
    • STEL: Short term exposure limit
    • LC50: Lethal Concentration 50%
    • LD50: Lethal Dose 50%
    • EC50: Effective Concentration 50%

    References

    • IPCS - The International Chemical Safety Cards (ICSC), website: http://www.ilo.org/dyn/icsc/showcard.home
    • HSDB - Hazardous Substances Data Bank, website: https://toxnet.nlm.nih.gov/newtoxnet/hsdb.htm
    • IARC - International Agency for Research on Cancer, website: http://www.iarc.fr/
    • eChemPortal - The Global Portal to Information on Chemical Substances by OECD, website: http://www.echemportal.org/echemportal/index?pageID=0&request_locale=en
    • CAMEO Chemicals, website: http://cameochemicals.noaa.gov/search/simple
    • ChemIDplus, website: http://chem.sis.nlm.nih.gov/chemidplus/chemidlite.jsp
    • ERG - Emergency Response Guidebook by U.S. Department of Transportation, website: http://www.phmsa.dot.gov/hazmat/library/erg
    • Germany GESTIS-database on hazard substance, website: http://www.dguv.de/ifa/gestis/gestis-stoffdatenbank/index-2.jsp
    • ECHA - European Chemicals Agency, website: https://echa.europa.eu/

    Disclaimer: The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. We as supplier shall not be held liable for any damage resulting from handling or from contact with the above product.
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