Substance profile
Dibromomethane
Dibromomethane is a clear, colorless liquid.
01 · Identification
What Dibromomethane is
Dibromomethane is a clear, colorless liquid. Its molecular formula is CH2Br2 and its molecular weight is 173.83 g/mol. It boils at 97 °C, melts at -52.5 °C, is miscible with water.
Under the GHS it carries the signal word Warning.
02 · Identifiers
Dibromomethane identifiers and molecular data
Dibromomethane CAS number and EC number
Dibromomethane molecular formula and molecular weight
03 · GHS classification
Dibromomethane hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Dibromomethane pictograms and signal word
Dibromomethane hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - inhalation GHS chapter 3.1 | Category 4 | H332 | GHS07 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 3 | H412 | — |
Dibromomethane hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H332 | Harmful if inhaled. |
| H412 | Harmful to aquatic life with long lasting effects. |
This page lists only the codes assigned to Dibromomethane. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Dibromomethane
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Dibromomethane issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Dibromomethane precautionary statements
CLP Annex VI assigns 6 precautionary statements to Dibromomethane. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Disposal
What has to happen to the contents and the empty container.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Dibromomethane name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | дибромометан |
| Spanish español | Dibromometano |
| Czech čeština | dibrommethan |
| Danish dansk | dibrommethan |
| German Deutsch | Dibrommethan Methylenbromid |
| Estonian eesti | dibromometaan |
| Greek ελληνικά | διβρωμομεθάνιο |
| English English | dibromomethane |
| French français | dibromométhane |
| Croatian hrvatski | dibrommetan |
| Italian italiano | dibromometano |
| Latvian latviešu | dibrommetāns |
| Lithuanian lietuvių | dibrommetanas |
| Hungarian magyar | dibrómmetán |
| Maltese Malti | dibromometan |
| Dutch Nederlands | dibroommethaan |
| Polish polski | dibromometan dibromek metylenubromek metylenu |
| Portuguese português | dibromometano |
| Romanian română | dibromometan |
| Slovak slovenčina | dibrómmetán |
| Slovenian slovenščina | dibromometan |
| Finnish suomi | dibromimetaani metyleenidibromidi |
| Swedish svenska | dibrommetan |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Dibromomethane GHS label elements
Everything CLP Annex VI fixes for Dibromomethane, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Dibromomethane
- Harmful if inhaled.
- Harmful to aquatic life with long lasting effects.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Use only outdoors or in a well-ventilated area.
- Avoid release to the environment.
- IF INHALED:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Dibromomethane in the GHS label constructor →
07 · Health hazards
Dibromomethane health hazards and exposure limits
Dibromomethane hazard summary
In laboratory studies, animals experienced CNS depression at 2400-2800 ppm and liver and kidney damage after repeated exposures to 1000 ppm. [CHEMINFO] Dichloromethane seldom causes hepatotoxicity unless exposure is very heavy or agent ingested. [Zimmerman, p. 333] If left on clothes, may cause reddening of skin; [CHRIS] May have effects on nervous system and blood, causing impaired functions, carboxyhemoglobinemia, and lowering of consciousness; Chronic exposure may cause liver and kidney effects; [ICSC] An irritant; Harmful by inhalation; A simple asphyxiant; May cause blood disorders, cardiac irregularities, and CNS depression; [Sigma-Aldrich MSDS]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Dibromomethane properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
Dibromomethane boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 97 °C (206.6 °F) | HSDB | |
| 97 °C (206.6 °F) | at 760 mmHg | CAMEO |
Dibromomethane melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -52.5 °C (-62.5 °F) | HSDB | |
| -52.7 °C (-62.9 °F) | ICSC |
Dibromomethane density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 2.5 g/cm³ | ICSC | |
| 2.4969 g/cm³ | at 20 °C | HSDB | |
| 2.497 g/cm³ | at 20 °C | CAMEO |
Dibromomethane solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Miscible with chloroform, alcohol, ether, acetone | HSDB | |
| > 10% in acetone | HSDB | ||
| > 10% in ether | HSDB |
Dibromomethane vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 87.89 mmHg | CAMEO | |
| 40 mmHg | at 23.3 °C | HSDB | |
| 44.4 mmHg | at 25 °C | HSDB |
Dibromomethane autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 515 °C (959 °F) | ICSC |
Dibromomethane vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 6.05 (air = 1) | HSDB | |
| 6 (air = 1) | ICSC |
Dibromomethane critical temperature and pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Critical temperature and pressure | 309.85 °C (589.7 °F) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Dibromomethane fire and explosion behaviour
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Dibromomethane fire potential
NOT FLAMMABLE BY STANDARD TEST IN AIR
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Dibromomethane storage and handling
Dibromomethane safe storage
Separated from food and feedstuffs, strong oxidants, strong bases and metals. Do NOT store or transport in containers made from aluminium or plastic. Ventilation along the floor.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Dibromomethane storage conditions
... MATERIALS WHICH ARE TOXIC AS STORED OR WHICH CAN DECOMP INTO TOXIC COMPONENTS DUE TO CONTACT WITH HEAT, MOISTURE, ACID, OR ACID FUMES, SHOULD BE STORED IN COOL, WELL VENTILATED PLACE, OUT OF DIRECT RAYS OF SUN, AWAY FROM AREAS OF HIGH FIRE HAZARD & SHOULD BE PERIODICALLY INSPECTED & MONITORED.
Source: Hazardous Substances Data Bank (HSDB)
Dibromomethane incompatible materials
Although apparently stable on contact, mixtures of potassium (or its alloys) with a wide range of halocarbons are shock-sensitive & may explode with great violence on light impact. Chloroethane, dichloroethane ... dibromomethane & diiodomethane are among those investigated. Sensitivity increases generally with the degree of substitution ...
Source: Hazardous Substances Data Bank (HSDB)
Dibromomethane reactivity
Halogenated aliphatic compounds, such as DIBROMOMETHANE, 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, nitrides, azo/diazo compounds, alkali metals (potassium), and epoxides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Dibromomethane in the storage compatibility matrix →
11 · Transport
Dibromomethane UN number and transport classification
Transport classification is a separate system from the GHS classification above. It decides how a package is marked and how a load may be carried; it does not follow from the workplace label, and the workplace label does not follow from it. The entries below are linked by CAS number, never by name.
Dibromomethane under UN 2664 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| DIBROMOMETHANE | 6.1 | T1 | III | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 6.1 is “Toxic substances” (ADR 2.1.1.1).
United States · 49 CFR 172.101 Hazardous Materials Table
| Proper shipping name (column 2) | Class or division | PG | Labels (column 6) |
|---|---|---|---|
| Dibromomethane | 6.1 | III | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 6.1 is “Poisonous materials” (49 CFR 173.2).
12 · Questions
Dibromomethane — frequently asked questions
What is the CAS number of Dibromomethane?
The CAS number of Dibromomethane is 74-95-3. Its EC number is 200-824-2.
What is the chemical formula of Dibromomethane?
The molecular formula of Dibromomethane is CH2Br2 and its molecular weight is 173.83 g/mol.
What does a Dibromomethane label have to show?
Under CLP Annex VI the label for Dibromomethane carries the pictogram Exclamation mark and the signal word is Warning.
Is Dibromomethane flammable?
CLP Annex VI assigns Dibromomethane no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it.
Is Dibromomethane a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Dibromomethane. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
What is the boiling point of Dibromomethane?
The boiling point reported for Dibromomethane is 97 °C (206.6 °F) (HSDB).
What is the melting point of Dibromomethane?
The melting point reported for Dibromomethane is -52.5 °C (-62.5 °F) (HSDB).
How should Dibromomethane be stored?
... MATERIALS WHICH ARE TOXIC AS STORED OR WHICH CAN DECOMP INTO TOXIC COMPONENTS DUE TO CONTACT WITH HEAT, MOISTURE, ACID, OR ACID FUMES, SHOULD BE STORED IN COOL, WELL VENTILATED PLACE, OUT OF DIRECT RAYS OF SUN, AWAY FROM AREAS OF HIGH FIRE HAZARD & SHOULD BE PERIODICALLY INSPECTED & MONITORED. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Dibromomethane
Keep going: substances starting with D, or search the whole database by name, CAS number, pictogram or signal word.