iodomethane
CAS No.: 74-88-4 Formula: CH3I Molecular Weight: 141.93900

iodomethane

CAS No.: 74-88-4 Formula: CH3I Molecular Weight: 141.93900
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Description

Methyl iodide, also called iodomethane, and commonly abbreviated "MeI", is the chemical compound with the formula CH3I. It is a dense, colorless, volatile liquid. In terms of chemical structure, it is related to methane by replacement of one hydrogen atom by an atom of iodine. It is naturally emitted by rice plantations in small amounts. It is also produced in vast quantities estimated to be greater than 214,000 tons annually by algae and kelp in the world's temperate oceans, and in lesser amounts on land by terrestrial fungi and bacteria. It is used in organic synthesis as a source of methyl groups.
Methyl iodide had been approved for use as a pesticide by the United States Environmental Protection Agency in 2007 as a pre-plant biocide used to control insects, plant parasitic nematodes, soil borne pathogens, and weed seeds. The compound was registered for use as a preplant soil treatment for field grown strawberries, peppers, tomatoes, grape vines, ornamentals and turf and nursery grown strawberries, stone fruits, tree nuts, and conifer trees. After the discovery phase in a consumer lawsuit, the manufacturer withdrew the fumigant citing its lack of market viability.

Basic Info

Chemical Name iodomethane
Synonyms

methyl iodide; iodo-methan; methyl iodine; methane iodide; Methane, iodo-; Iodomethane; 10domethane; Jodmethan; Iodometano; CH3I; iodo-methane; Iodmethan; Expand

CAS No. 74-88-4
Molecular Formula CH3I
Molecular Weight 141.93900
PSA 0.00000
LogP 1.05120

Properties

Appearance & Physical State Clear to pink liquid
Density 2.279
Boiling Point 41-43ºC
Melting Point -64ºC
Flash Point -28ºC
Refractive Index 1.531
Water Solubility 14 g/L (20 ºC)
Storage Condition Store at 0ºC
Vapor Density 4.89 (vs air)
Vapor Pressure 24.09 psi ( 55 °C)

Safety Info

RTECS PA9450000
Hazard Class 6.1
Safety Statements S16-S24-S36/37-S38-S45-S9
HS Code 2903399030
WGK Germany 1
Packing Group I
RIDADR UN 2644
Risk Statements R11; R21; R23/25; R37/38; R40
Hazard Codes F
Caution Statement P261; P280; P301 + P310; P311
Symbol GHS06, GHS08
Hazard Declaration H301 + H331; H312; H315; H317; H334; H335; H351
Signal Word Danger
SDS Version: 1.0 Expand

SDS Version: 1.0

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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 iodomethane

1.2 Other means of identification

Product number -
Other names methyl iodide

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Methyl iodide is used as an intermediate in the manufacture of some pharmaceuticals and pesticides. It is also used in methylation processes and in the field of microscopy. Proposed uses of methyl iodide are as a fire extinguisher and as an insecticidal fumigant.
Uses advised against no data available

1.4 Supplier's details

Company XiXisys.com
Address XiXisys.com
Telephone XiXisys.com
Fax XiXisys.com

1.5 Emergency phone number

Emergency phone number -
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 3

Acute toxicity - Dermal, Category 4

Skin irritation, Category 2

Acute toxicity - Inhalation, Category 3

Specific target organ toxicity – single exposure, Category 3

Carcinogenicity, Category 2

2.2 GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Danger

Hazard statement(s)

H301 Toxic if swallowed

H312 Harmful in contact with skin

H315 Causes skin irritation

H331 Toxic if inhaled

H335 May cause respiratory irritation

H351 Suspected of causing cancer

Precautionary statement(s)
Prevention

P264 Wash ... thoroughly after handling.

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

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

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P271 Use only outdoors or in a well-ventilated area.

P201 Obtain special instructions before use.

P202 Do not handle until all safety precautions have been read and understood.

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/...

P312 Call a POISON CENTER/doctor/…if you feel unwell.

P362+P364 Take off contaminated clothing and wash it before reuse.

P332+P313 If skin irritation occurs: Get medical advice/attention.

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

P311 Call a POISON CENTER/doctor/…

P308+P313 IF exposed or concerned: Get medical advice/ attention.

Storage

P405 Store locked up.

P403+P233 Store in a well-ventilated place. Keep container tightly closed.

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
iodomethane iodomethane 74-88-4 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

Fresh air, rest. Refer immediately for medical attention.

In case of skin contact

Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention .

In case of eye contact

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

If swallowed

Rinse mouth. Do NOT induce vomiting. Give a slurry of activated charcoal in water to drink. Refer immediately for medical attention.

4.2 Most important symptoms/effects, acute and delayed

Inhalation of vapor causes lung congestion and pulmonary edema. Higher concentrations causes rapid narcosis and death. Contact with liquid irritates eyes and burns skin. (USCG, 1999)

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

Flush eyes thoroughly with water and wash contaminated areas of body with soap and water. Treat skin burns as usual.

5.Fire-fighting measures

5.1 Extinguishing media

Suitable extinguishing media

Self-contained breathing apparatus with a full facepiece operated in pressure-demand or other positive-pressure mode.

5.2 Specific hazards arising from the chemical

Special Hazards of Combustion Products: Toxic and irritating gases are generated when exposed to fire or heat. Behavior in Fire: Containers may explode (USCG, 1999)

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

Evacuate danger area! Consult an expert! Personal protection: self-contained breathing apparatus. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.

6.3 Methods and materials for containment and cleaning up

1. VENTILATE AREA OF SPILL OR LEAK. 2. COLLECT FOR RECLAMATION OR ABSORB IN VERMICULITE, DRY SAND, EARTH, OR SIMILAR MATERIAL.

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

Provision to contain effluent from fire extinguishing. Separated from strong oxidants and food and feedstuffs. Well closed. Ventilation along the floor. Store in an area without drain or sewer access.Keep containers closed and store in a dark place.

8.Exposure controls/personal protection

8.1 Control parameters

Occupational Exposure limit values

NIOSH considers methyl iodide to be a potential occupational carcinogen.

NIOSH usually recommends that occupational exposures to carcinogens be limited to the lowest feasible concentration.

Recommended Exposure Limit: 10 Hr Time-Weighted Avg: 2 ppm (10 mg/cu m), skin.

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 Clear to pink liquid
Colour Colorless, transparent liquid (turns brown on exposure to light)
Odour Pungent, ether-like odor.
Melting point/ freezing point 252°C(dec.)(lit.)
Boiling point or initial boiling point and boiling range 41-43°C(lit.)
Flammability Noncombustible LiquidNot combustible. Gives off irritating or toxic fumes (or gases) in a fire.
Lower and upper explosion limit / flammability limit no data available
Flash point -18°C
Auto-ignition temperature 355°C
Decomposition temperature no data available
pH no data available
Kinematic viscosity 0.606 cP at 0°C, 0.424 cP at 40°C.
Solubility In water:14 g/L (20 ºC)
Partition coefficient n-octanol/water (log value) log Kow= 1.51
Vapour pressure 24.09 psi ( 55 °C)
Density and/or relative density 2.28g/mLat 25°C(lit.)
Relative vapour density 4.89 (vs air)
Particle characteristics no data available

10.Stability and reactivity

10.1 Reactivity

no data available

10.2 Chemical stability

COLORLESS LIQUID THAT TURNS YELLOW, RED OR BROWN WHEN EXPOSED TO LIGHT & MOISTURE.

10.3 Possibility of hazardous reactions

Iodomethane is not flammable.The vapour is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen.Halogenated aliphatic compounds, such as METHYL IODIDE, are moderately or very reactive. Halogenated organics generally become less reactive as more of their hydrogen atoms are replaced with halogen atoms. Low molecular weight haloalkanes are highly flammable and can react with some metals to form dangerous products. Materials in this group are incompatible with strong oxidizing and reducing agents. Also, they are incompatible with many amines, alkylphosphines, nitrides, azo/diazo compounds, alkali metals (sodium), and epoxides.

10.4 Conditions to avoid

no data available

10.5 Incompatible materials

Strong oxidizers [Note: Decomposes at 518 degrees F].

10.6 Hazardous decomposition products

IODIDE & HYDROGEN IODIDE MAY BE RELEASED WHEN METHYL IODIDE UNDERGOES THERMAL DECOMPOSITION (270 DEG C).

11.Toxicological information

Acute toxicity

  • Oral: no data available
  • Inhalation: LCLO Mouse inhalation 78,693 ppm/10 min.
  • 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

Cancer Classification: Not Likely to be Carcinogenic to Humans at Doses that Do Not Alter Rat Thyroid Hormone Homeostasis

Reproductive toxicity

No information is available on the reproductive or developmental effects of methyl iodide in humans or animals.

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

An estimated BCF of 2.9 was calculated for methyl iodide(SRC), using a log Kow of 1.51(1,SRC) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is low. While methyl iodide has been detected in various fish and shellfish, it is thought that the chemical may have been formed biogenically(4).

12.4 Mobility in soil

Using a structure estimation method based on molecular connectivity indices(1), the Koc for methyl iodide can be estimated to be 14(SRC). According to a classification scheme(2), this estimated Koc value suggests that methyl iodide should have very high mobility in soil. The soil/water distribution coefficient of methyl iodide in various soils were (soil, Kd): Greenfield sandy loam, 0.09; Linne clay loam, 0.15; Carsetas loamy sand, 0.16; and potting mix, 0.55(3).

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: UN2644 IMDG: UN2644 IATA: UN2644

14.2 UN Proper Shipping Name

ADR/RID: METHYL IODIDE
IMDG: METHYL IODIDE
IATA: METHYL IODIDE

14.3 Transport hazard class(es)

ADR/RID: 6.1 IMDG: 6.1 IATA: 6.1

14.4 Packing group, if applicable

ADR/RID: II IMDG: II IATA: II

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
iodomethane iodomethane 74-88-4 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 Not 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.
MSDS Expand
1H NMR : parameter in CDCl3Expand

NMR Spectrum 1H NMR : parameter in CDCl3

Collapse

C H3 I 0.05 ml : 0.5 ml CDCl3
iodomethane

Parameter ppm Hz
D(A) 2.165

IR : liquid filmExpand
ESR : METHYL RADICAL, X-IRRAD.(53%13C), 77KExpand

GC Analysis

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Packed OV-1 100. 523. isothermal
Packed OV-1 125. 528. isothermal
Packed OV-1 75. 518. isothermal
Packed Apolane 70. 528.6 isothermal
Packed Squalane 27. 502. isothermal
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