Substance profile
Chlormephos
Chlormephos is a colorless liquid.
01 · Identification
What Chlormephos is
Chlormephos is a colorless liquid. Its molecular formula is C5H12ClO2PS2 and its molecular weight is 234.7 g/mol.
Under the GHS it carries the signal word Danger.
02 · Identifiers
Chlormephos identifiers and molecular data
Chlormephos CAS number and EC number
Chlormephos molecular formula and molecular weight
Other names for Chlormephos
- chlormephos (ISO)
- S-chloromethyl O,O-diethyl phosphorodithioate
03 · GHS classification
Chlormephos hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Chlormephos pictograms and signal word
Chlormephos hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 1 or 2 | H300 | GHS06 |
| Acute toxicity - dermal GHS chapter 3.1 | Category 1 or 2 | H310 | GHS06 |
| Hazardous to the aquatic environment - acute GHS chapter 4.1 | Category 1 | H400 | GHS09 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 1 | H410 | GHS09 |
Where two values are shown with “or”, the hazard statement is shared by more than one category or by more than one class, and the code alone does not say which. H272, for example, belongs to oxidising liquids and to oxidising solids — the physical state decides. The binding answer for a specific entry is in the CLP Annex VI table itself.
Chlormephos hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H310 | Fatal in contact with skin. |
| H300 | Fatal if swallowed. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to Chlormephos. 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 Chlormephos
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 Chlormephos 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
Chlormephos precautionary statements
CLP Annex VI assigns 10 precautionary statements to Chlormephos. 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
Chlormephos 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 | хлормефос (ISO) О , О -диетилов S -хлорометилов фосфородитиоат |
| Spanish español | Clormefós (ISO) fosforoditioato de S -clorometilo y O , O -dietilo |
| Czech čeština | chlormefos (ISO) S -chlormethyl- O, O -diethyl-fosforodithioát |
| Danish dansk | chlormephos (ISO) S- chlormethyl- O, O- diethylphosphordithioat |
| German Deutsch | Chlormephos (ISO) S -Chlormethyl- O , O -diethylphosphorodithioat |
| Estonian eesti | kloormefoss (ISO) S -klorometüül- O , O -dietüülfosforoditioaat |
| Greek ελληνικά | chlormephos (χλωρομεφός) (ISO) διθειοφωσφορικό S -χλωρομεθύλιο O , O -διαιθύλιο |
| English English | chlormephos (ISO) S -chloromethyl O , O -diethyl phosphorodithioate |
| French français | chlorméphos (ISO) phosphorodithioate de S -chlorométhyle et de O , O -diéthyle |
| Croatian hrvatski | klormefos (ISO) S -klormetil- O , O -dietil-fosforoditioat |
| Italian italiano | clormefos (ISO) ditiofosfato di S-clorometile e O, O-dietile |
| Latvian latviešu | hlormefoss (ISO) S -hlormetil- O , O -dietilfosforditioāts |
| Lithuanian lietuvių | chlormefosas (ISO) S -chlormetil O , O -dietilditiofosfatas |
| Hungarian magyar | klórmefosz (ISO) S -klórmetil- O , O -dietil-ditiofoszfát |
| Maltese Malti | klormefos (ISO) fosforoditijoat ta’ S -klorometil O , O -dietil |
| Dutch Nederlands | chloormefos (ISO) S -chloormethyl- O , O -diëthyldithiofosfaat |
| Polish polski | chloromefos (ISO) ditiofosforan S-chlorometylu-O, O-dietylu |
| Portuguese português | clormefos (ISO) ditiofosfato de S -clorometilo e de O , O -dietilo |
| Romanian română | clormefos (ISO) ditiofosfat de S - clorometil și de O , O -dietil |
| Slovak slovenčina | chlórmefos (ISO) O, O -dietyl- S -(chlórmetyl)-fosforoditioát |
| Slovenian slovenščina | klormefos (ISO) S -klorometil O , O -dietil fosforoditioat |
| Finnish suomi | klormefossi (ISO) S -kloorimetyyli- O , O -dietyylifosforoditioaatti |
| Swedish svenska | klormefos (ISO) S -klormetyl- O , O -dietylfosforditioat |
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
Chlormephos GHS label elements
Everything CLP Annex VI fixes for Chlormephos, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Chlormephos
- Fatal in contact with skin.
- Fatal if swallowed.
- Very toxic to aquatic life.
- Very toxic to aquatic life with long lasting effects.
- Do not eat, drink or smoke when using this product.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- IF ON SKIN:
- Immediately call a POISON CENTER/doctor/…
- Rinse mouth.
- Wash with plenty of water/…
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Chlormephos in the GHS label constructor →
07 · Health hazards
Chlormephos health hazards and exposure limits
Chlormephos hazard summary
A non-systemic cholinesterase inhibitor; [Merck Index] May be absorbed through skin; A cholinesterase inhibitor; [ICSC] The average of two baseline respective cholinesterase activity determinations three days apart, with no exposures to enzyme inhibiting pesticides for at least 30 days, is recommended for each worker prior to exposure to cholinesterase inhibitors because of large inter-individual differences in published baseline values. To be established at least once a year. Removal from workplace exposures is recommended until the cholinesterase activity returns to within 20% of baseline. [TLVs and BEIs]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Chlormephos 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.
Chlormephos boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 83 °C (181.4 °F) | range, midpoint shown, at 0.1 mmHg (reduced pressure) | HSDB |
| 83.06 °C (181.5 °F) | range, midpoint shown, at 0.1 mmHg (reduced pressure) | CAMEO |
Chlormephos density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.26 g/cm³ | CAMEO | |
| 1.26 g/cm³ | at 20 °C | HSDB |
Chlormephos solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Miscible with most organic solvents | HSDB | |
| 60 mg/l water at 20 °C | at 20 °C | HSDB | |
| Solubility in water, g/100ml at 20 °C: 0.006 (very poor) | at 20 °C | ICSC |
Chlormephos vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.057 mmHg | at 30 °C | HSDB |
| 0.0056 mmHg | at 30 °C | CAMEO |
Chlormephos flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 100 °C (212 °F) | above this value | ICSC |
Chlormephos lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Combustible. | HSDB |
Chlormephos corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | Corrosive to some metals. | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
Chlormephos storage and handling
Chlormephos safe storage
Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Well closed. Store in an area without drain or sewer access.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Chlormephos storage conditions
Rooms used for storage only should be soundly constructed & fitted with secure locks. Floors should be kept clear & pesticides clearly identified. If repacking is carried out in storage rooms, adequate light should be available; floors should be impervious & sound ... . /Pesticides/
Source: Hazardous Substances Data Bank (HSDB)
Chlormephos reactivity
Organophosphates, such as CHLORMEPHOS, are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Chlormephos in the storage compatibility matrix →
10 · Questions
Chlormephos — frequently asked questions
What is the CAS number of Chlormephos?
The CAS number of Chlormephos is 24934-91-6. Its EC number is 246-538-1.
What is the chemical formula of Chlormephos?
The molecular formula of Chlormephos is C5H12ClO2PS2 and its molecular weight is 234.7 g/mol.
What does a Chlormephos label have to show?
Under CLP Annex VI the label for Chlormephos carries the pictograms Skull and crossbones and Environment and the signal word is Danger.
Is Chlormephos flammable?
CLP Annex VI assigns Chlormephos 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. The flash point reported for it is 100 °C (212 °F), above this value (ICSC).
Is Chlormephos a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Chlormephos. 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 Chlormephos?
The boiling point reported for Chlormephos is 83 °C (181.4 °F), range, midpoint shown, at 0.1 mmHg (reduced pressure) (HSDB).
How should Chlormephos be stored?
Rooms used for storage only should be soundly constructed & fitted with secure locks. Floors should be kept clear & pesticides clearly identified. If repacking is carried out in storage rooms, adequate light should be available; floors should be impervious & sound ... . /Pesticides/ (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Chlormephos
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