Provenance

Reference data from EU CLP Annex VI and published regulations — verify against your supplier's SDS before use.

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Substance profile

Chlorthiophos I

Chlorthiophos I is a brown liquid with crystals at low temp.

CAS 21923-23-9 C11H15Cl2O3PS2 361.2 g/mol Danger

01 · Identification

What Chlorthiophos I is

Chlorthiophos I is a brown liquid with crystals at low temp. Its molecular formula is C11H15Cl2O3PS2 and its molecular weight is 361.2 g/mol. It boils at 150 °C.

Under the GHS it carries the signal word Danger.

02 · Identifiers

Chlorthiophos I identifiers and molecular data

Chlorthiophos I CAS number and EC number

CAS number21923-23-9
EC number244-663-6
Index number (CLP Annex VI)015-115-00-1

Chlorthiophos I molecular formula and molecular weight

Molecular formulaC11H15Cl2O3PS2
Molecular weight361.2 g/mol

Other names for Chlorthiophos I

  • chlorthiophos (ISO)
  • [isomeric reaction mass in which O-2,5-dichlorophenyl-4-methylthiophenyl O,O-diethyl phosphorothioate predominates]

03 · GHS classification

Chlorthiophos I hazard classification

Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.

Chlorthiophos I pictograms and signal word

Signal wordDanger

Chlorthiophos I hazard class and category

GHS hazard classes Chlorthiophos I falls into
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 3 H311 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.

Chlorthiophos I hazard statements (H-codes)

Hazard statements assigned to Chlorthiophos I
CodeHazard statement
H300 Fatal if swallowed.
H311 Toxic in contact with skin.
H400 Very toxic to aquatic life.
H410 Very toxic to aquatic life with long lasting effects.

This page lists only the codes assigned to Chlorthiophos I. 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 Chlorthiophos I

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 Chlorthiophos I 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

Chlorthiophos I precautionary statements

CLP Annex VI assigns 10 precautionary statements to Chlorthiophos I. 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.

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

Chlorthiophos I 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 хлортиофос (ISO)
Spanish español Clortiofós (ISO)
Czech čeština chlorthiofos (ISO)
Danish dansk chlorthiophos (ISO)
German Deutsch Chlorthiophos (ISO)
Estonian eesti kloortiofoss (ISO)
Greek ελληνικά chlorthiophos (χλωροθειοφός) (ISO)
English English chlorthiophos (ISO)
French français chlorthiophos (ISO)
Croatian hrvatski klortiofos (ISO)
Italian italiano clortiofos (ISO [miscela di reazione isomerica nella quale predomina il fosforotioato di O-2,5-diclorofenil-4-metiltiofenile e O, O-dietile])
Latvian latviešu hlortiofoss (ISO)
Lithuanian lietuvių chlortiofosas (ISO)
Hungarian magyar klórtiofosz (ISO)
Maltese Malti klortijofos (ISO)
Dutch Nederlands chloorthiofos (ISO)
Polish polski chlortiofos (ISO)
Portuguese português clortiofos (ISO)
Romanian română clortiofos (ISO)
Slovak slovenčina chlórtiofos (ISO)
Slovenian slovenščina klortiofos (ISO)
Finnish suomi klortiofossi (ISO) isomeerinen reaktiomassa, jossa hallitsevana O -2,5-dikloorifenyyli-4-metyylitiofenyyli- O , O -dietyylifosforotioaatti
Swedish svenska klortiofos (ISO)

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

Chlorthiophos I GHS label elements

Everything CLP Annex VI fixes for Chlorthiophos I, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.

GHS06 Skull and crossbones pictogramGHS09 Environment pictogram

Danger

Chlorthiophos I

  • Fatal if swallowed.
  • Toxic in contact with skin.
  • 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 Chlorthiophos I in the GHS label constructor →

07 · Health hazards

Chlorthiophos I health hazards and exposure limits

Chlorthiophos I hazard summary

A cholinesterase inhibitor; May be absorbed through skin; [CAMEO] Effects in high-dose animal studies include convulsions, dyspnea, and inhibition of cholinesterase; [RTECS] 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

Chlorthiophos I 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.

Chlorthiophos I boiling point

Property Value Conditions Source
Boiling point 150 °C (302 °F) at 760 mmHg DOE PAC
150 °C (302 °F) at 0.001 mmHg (reduced pressure) HSDB
155.28 °C (311.5 °F) range, midpoint shown, at 0.013 mmHg (reduced pressure) CAMEO

Chlorthiophos I density

Property Value Conditions Source
Density 1.345 g/cm³ at 20 °C CAMEO

Chlorthiophos I solubility

Property Value Conditions Source
Solubility Practically insol in water, sol in most organic solvents HSDB

Chlorthiophos I vapor pressure

Property Value Conditions Source
Vapor pressure 0.0004 mmHg at 25 °C CAMEO
0.0000024 mmHg Haz-Map

Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.

09 · Handling and storage

Chlorthiophos I storage and handling

Chlorthiophos I 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)

Chlorthiophos I reactivity

Organophosphates, such as CHLORTHIOPHOS, 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 Chlorthiophos I in the storage compatibility matrix →

10 · Questions

Chlorthiophos I — frequently asked questions

What is the CAS number of Chlorthiophos I?

The CAS number of Chlorthiophos I is 21923-23-9. Its EC number is 244-663-6.

What is the chemical formula of Chlorthiophos I?

The molecular formula of Chlorthiophos I is C11H15Cl2O3PS2 and its molecular weight is 361.2 g/mol.

What does a Chlorthiophos I label have to show?

Under CLP Annex VI the label for Chlorthiophos I carries the pictograms Skull and crossbones and Environment and the signal word is Danger.

Is Chlorthiophos I flammable?

CLP Annex VI assigns Chlorthiophos I 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 Chlorthiophos I a carcinogen?

CLP Annex VI records no harmonised carcinogenicity classification for Chlorthiophos I. 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 Chlorthiophos I?

The boiling point reported for Chlorthiophos I is 150 °C (302 °F), at 760 mmHg (DOE PAC).

How should Chlorthiophos I 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

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