CAS No. 16881-77-9

Formula: C3H10O2Si
Basic Info

Molecular Weight
Exact Mass


Silane, dimethoxymethyl-



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Appearance & Physical State
Colorless clear liquid
Boiling Point
Melting Point
Refractive Index
Vapor Pressure
115.438mmHg at 25°C
Safety Info
Safety Statements
Risk Statements
R11; R37/38; R41
HS Code
UN 1992
Hazard Class
Packing Group
SDS 1.0
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According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 10, 2017

Revision Date: Aug 10, 2017


1.1 GHS Product identifier

Product name Dimethoxy(methyl)silane

1.2 Other means of identification

Product number -
Other names DiMethoxy(Methyl)silane

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Adhesives and sealant chemicals
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

Flammable liquids, Category 2

2.2 GHS label elements, including precautionary statements

Signal word


Hazard statement(s)

H225 Highly flammable liquid and vapour

Precautionary statement(s)

P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.

P233 Keep container tightly closed.

P240 Ground and bond container and receiving equipment.

P241 Use explosion-proof [electrical/ventilating/lighting/...] equipment.

P242 Use non-sparking tools.

P243 Take action to prevent static discharges.

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


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

P370+P378 In case of fire: Use ... to extinguish.


P403+P235 Store in a well-ventilated place. Keep cool.


P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification


3.Composition/information on ingredients

3.1 Substances

Chemical name Common names and synonyms CAS number EC number Concentration
Dimethoxy(methyl)silane Dimethoxy(methyl)silane 16881-77-9 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 Colorless clear liquid
Colour no data available
Odour no data available
Melting point/ freezing point 245°C(lit.)
Boiling point or initial boiling point and boiling range 61°C
Flammability no data available
Lower and upper explosion limit / flammability limit no data available
Flash point -9°C(lit.)
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 115.438mmHg at 25°C
Density and/or relative density 0.861
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


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


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: UN1992 IMDG: UN1992 IATA: UN1992

14.2 UN Proper Shipping Name


14.3 Transport hazard class(es)


14.4 Packing group, if applicable


14.5 Environmental hazards

ADR/RID: no IMDG: no IATA: no

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
Dimethoxy(methyl)silane Dimethoxy(methyl)silane 16881-77-9 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 Not Listed.
New Zealand Inventory of Chemicals (NZIoC) Not Listed.
Philippines Inventory of Chemicals and Chemical Substances (PICCS) Not Listed.
Vietnam National Chemical Inventory Not Listed.
Chinese Chemical Inventory of Existing Chemical Substances (China IECSC) Listed.

16.Other information

Information on revision

Creation Date Aug 10, 2017
Revision Date Aug 10, 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%


  • 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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Section I.Chemical Product and Company Identification
    Chemical Name Dimethoxy(methyl)silane
    Portland OR
    Chemical Formula
    (CH 3 O) 2 SiHCH 3
    CAS Number

Section II.        Composition and Information on Ingredients    
    CAS Number Percent (%)        TLV/PEL        Toxicology Data    
    Chemical Name
    Not available.        Not available.    
    Dimethoxy(methyl)silane        16881-77-9        Min. 98.0 (GC)    

Section III.        Hazards Identification    
    Acute Health Effects
    N o specific inform ation is available in our data base regarding the toxic effects of this m aterial for hum ans. H ow ever,
    exposure to any chem ical should be kept to a m inim u m . Skin and eye contact m ay result in irritation. M ay be harm ful if
    inhaled or ingested. A lw ays follow safe industrial hygiene practices and w ear proper protective equipm ent w hen
    handling this compound.
    Chronic Health Effects        CARCINOGENIC EFFECTS : Not available.    
    MUTAGENIC EFFECTS : Not available.
    TERATOGENIC EFFECTS : Not available.
    Toxicity to the reproductive system: Not available.
    There is no know n effect from chronic exposure to this product.        Repeated or prolonged exposure to this com pound is    
    not known to aggravate existing medical conditions.

Section IV.        First Aid Measures    
    Eye Contact
    C heck for and rem ove any contact lenses. D O N O T use an eye ointm ent. Flush eyes w ith running w ater for a m inim um
    of 15 m inutes, occasionally lifting the upper and low er eyelids. Seek m edical attention. Treat sym ptom atically and
    Skin Contact
    If the chem ical gets spilled on a clothed portion of the body, rem ove the contam inated clothes as quickly as possible,
    protectin g you r ow n h an ds an d body. Place th e victim u n der a delu g e sh ow er. If th e ch em ical tou ch es th e victim 's
    exposed skin, such as the hands: G ently and thoroughly w ash the contam inated skin w ith running w ater and
    non-abrasive soap. Be particularly careful to clean folds, crevices, creases and groin. C over the irritated skin w ith an
    em ollient. Seek m edical attention. Treat sym ptom atically and supportively. W ash any contam inated clothing before
    Evacuate the victim to a safe area as soon as possible. Loosen tight clothing such as a collar, tie, belt or w aistband. If
    breathing is difficult, adm inister oxygen. If the victim is not breathing, perform artificial respiration. Seek m edical
    attention. Treat symptomatically and supportively.
    Rem ove den tu res if an y. W atch for an obstru ction in th e victim 's m ou th . Rem ove if possible w h at is cau sin g th e
    obstru ction bu t do n ot force fin g ers or a h ard object betw een th e victim 's teeth . H ave con sciou s person drin k several
    glasses of w ater or m ilk. IN D U C E V O M ITIN G by sticking finger in throat. Seek im m ediate m edical atten tion and, if
    possible, show the chemical label. Treat symptomatically and supportively.

Section V.        Fire and Explosion Data    
    Flammability        Not available.    
    Flammable Limits
    Flash Points
    Not available.
    -9°C (15.8°F)
    Combustion Products
    These products are toxic carbon oxides (CO, CO        2). Some metallic oxides.    
    Fire Hazards
    Reactive w ith strong oxidizers. V apors m ay travel to source of ignition and flash back. C losed containers m ay explode
    from the heat of a fire. Highly flammable in presence of open flames and sparks, of heat.
    Explosion Hazards
    Risks of explosion of the product in presence of mechanical impact: Not available.
    Risks of explosion of the product in presence of static discharge: Not available.
    No additional information is available regarding the risks of explosion.
    Continued on Next Page
    D21ppy Ast)INGS(U.S.).o
    Fire Fighting Media
    SMALL FIRE: Use DRY chemicals, CO        2, alcohol foam or water spray.    
    and Instructions        LA RG E FIRE: U se alcohol foam , w ater spray or fog. C ool containing vessels w ith w ater jet in order to prevent pressure    
    build-up, autoignition or explosion. C onsult w ith local fire authorities before attem pting large scale fire-fighting

Section VI.        Accidental Release Measures    
    Spill Cleanup
    Flammable liquid.
    Instructions        K eep aw ay from heat and sources of ignition. M echanical exhaust required. Stop leak if w ithout risk. A bsorb w ith D RY    
    earth, sand or other non-com bustible m aterial. D O N O T touch spilled m aterial. Prevent entry into sew ers, basem ents or
    confined areas; dike if needed. Eliminate all sources of ignition.

Section VII.        Handling and Storage    
    Handling and Storage
    FLA M M A BLE. Reactive w ith strong oxidizers; m ay be ignited by heat, sparks, or flam es. V apors m ay travel to source of
    ignition and flash back. C losed containers m ay explode from heat of a fire. Em pty containers m ay pose a fire risk.
    Evaporate residue under a fume hood if possible. Ground all equipment containing material.
    K eep aw ay from heat and sources of ignition. M echanical exhaust required. A void excessive heat and light. D o not
    breathe gas, fum es, vapor or spray. In case of insufficient ventilation, w ear suitable respiratory equipm ent. If you feel
    unw ell, seek m edical attention and show the label w hen possible. Treat sym ptom atically and supportively. A void
    contact with skin and eyes.
    Always store away from incompatible compounds such as oxidizing agents.

Section VIII.        Exposure Controls/Personal Protection    
    Engineering Controls
    Provide exhaust ventilation or other engineering controls to keep the airborne concentrations of vapors below their
    respective threshold limit value. Ensure that eyewash station and safety shower is proximal to the work-station location.
    Personal Protection
    Splash goggles. Lab coat. V apor respirator. Boots. G loves. A M SH A /N IO SH approved respirator m ust be used to avoid
    inhalation of the product. Suggested protective clothing m ight not be sufficient; consult a specialist BEFO RE handling
    this product.
    Exposure Limits
    Not available.

Section IX.        Physical and Chemical Properties    
    Physical state @ 20°C        Solubility    
    Not available.
    Specific Gravity
    0.86 (water=1)
    Molecular Weight        Partition Coefficient    
    106.2        Not available.    
    Boiling Point        Vapor Pressure    
    61°C (141.8°F)        Not available.    
    Melting Point        Vapor Density    
    Not available.        Not available.    
    Refractive Index        Volatility    
    Not available.        Not available.    
    Critical Temperature        Odor    
    Not available.        Not available.    
    Viscosity        Taste    
    Not available.        Not available.    

Section X.        Stability and Reactivity Data    

This material is stable if stored under proper conditions. (See Section VII for instructions)
    Conditions of Instability
    Avoid excessive heat and light.
    Reactive with strong oxidizing agents.

Section XI.        Toxicological Information    
    RTECS Number
    Not available.
    Routes of Exposure
    Ingestion. Inhalation.
    Toxicity Data
    Not available.
    Chronic Toxic Effects        CARCINOGENIC EFFECTS : Not available.    
    MUTAGENIC EFFECTS : Not available.
    TERATOGENIC EFFECTS : Not available.
    Toxicity to the reproductive system: Not available.
    There is no know n effect from chronic exposure to this product.        Repeated or prolonged exposure to this com pound is    
    not known to aggravate existing medical conditions.
    Acute Toxic Effects
    N o specific inform ation is available in our data base regarding the toxic effects of this m aterial for hum ans. H ow ever,
    exposure to any chem ical should be kept to a m inim u m . Skin and eye contact m ay result in irritation. M ay be harm ful if
    inhaled or ingested. A lw ays follow safe industrial hygiene practices and w ear proper protective equipm ent w hen
    handling this compound.
    Continued on Next Page

Section XII.        Ecological Information    
    Not available.
    Environmental Fate
    Not available.

Section XIII.        Disposal Considerations    
    Waste Disposal        Recycle to process, if possible. C onsult your local or regional authorities. You m ay be able to dissolve or m ix m aterial    
    w ith a com bustible solvent and burn in a chem ical incinerator equipped w ith an afterburner and scrubber system .
    Observe all federal, state, and local regulations when disposing of this substance.

Section XIV.        Transport Information    
    DOT Classification
    DOT CLASS 3: Flammable liquid.
    PIN Number
    Proper Shipping Name
    Flammable liquids n.o.s.
    Packing Group (PG)
    DOT Pictograms

Section XV.        Other Regulatory Information and Pictograms    
    TSCA Chemical Inventory
    ON the EPA Toxic Substances Control Act (TSCA) inventory.
    This product is
    WHMIS Classification
    WHMIS CLASS B-2: Flammable liquid with a flash point lower than 37.8°C (100°F).
    EINECS Number (EEC)
    Not available.
    EEC Risk Statements
    R12- Extremely flammable.
    Japanese Regulatory Data Not available.

Section XVI.
    Version 1.0
    Validated on 1/15/1997.

NMR Spectrum 1H NMR : 400 MHz in CDCl3
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IR Spectrum IR : liquid film
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Mass Spectrum Mass
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