Substance profile
Monuron
Monuron is white plates from methanol with a slight odor.
01 · Identification
What Monuron is
Monuron is white plates from methanol with a slight odor. Its molecular formula is C9H11ClN2O and its molecular weight is 198.65 g/mol. It boils at 193 °C, melts at 171 °C.
Under the GHS it carries the signal word Warning.
02 · Identifiers
Monuron identifiers and molecular data
Monuron CAS number and EC number
Monuron molecular formula and molecular weight
Other names for Monuron
- monuron (ISO)
- 3-(4-chlorophenyl)-1,1-dimethylurea
03 · GHS classification
Monuron hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Monuron pictograms and signal word
Monuron hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Carcinogenicity GHS chapter 3.6 | Category 2 | H351 | GHS08 |
| 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 |
Monuron hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H351 | Suspected of causing cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H302 | Harmful 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 Monuron. 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 Monuron
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 Monuron 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
Monuron precautionary statements
CLP Annex VI assigns 11 precautionary statements to Monuron. 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
Monuron 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 | монурон (ISO) 1,1-диметил-3-(4-хлорофенил)уреа |
| Spanish español | Monurón (ISO) 3-(4-clorofenil)-1,1-dimetilurea |
| Czech čeština | monuron (ISO) 3-(4-chlorfenyl)-1,1-dimethylmočovina |
| Danish dansk | monuron (ISO) 3-(4-dichlorphenyl)-1,1-dimethylurinstof |
| German Deutsch | Monuron (ISO) 3-(4-Chlorphenyl)-1,1-dimethylharnstoff |
| Estonian eesti | monuroon (ISO) 3-(4-klorofenüül)-1,1-dimetüülkarbamiid |
| Greek ελληνικά | monuron (μονουρόνη) (ISO) 3-(4-χλωροφαινυλο)-1,1-διμεθυλουρία |
| English English | monuron (ISO) 3-(4-chlorophenyl)-1,1-dimethylurea |
| French français | monuron (ISO) 3-(4-chlorophényl)-1,1-diméthylurée |
| Croatian hrvatski | monuron (ISO) 3-(4-klorfenil)-1,1-dimetil-urea |
| Italian italiano | monuron (ISO) 3-(4-clorofenil)-1,1-dimetilurea |
| Latvian latviešu | monurons (ISO) 3-(4-hlorfenil)-1,1-dimetilurīnviela |
| Lithuanian lietuvių | monuronas (ISO) 3-(4-chlorfenil)-1,1-dimetilkarbamidas |
| Hungarian magyar | monuron (ISO) 3-(4-klór-fenil)-1,1-dimetil-karbamid |
| Maltese Malti | monuron (ISO) 3-(4-klorofenil)-1,1-dimetilurea |
| Dutch Nederlands | monuron (ISO) 3-(4-chloorfenyl)-1,1-dimethylureum |
| Polish polski | monuron (ISO) 3-(4-chlorofenylo)-1,1-dimetylomocznik |
| Portuguese português | monurão (ISO) 3-(4-clorofenil)-1,1-dimetilureia |
| Romanian română | monuron (ISO) 3-(4-clorofenil)-1,1- dimetiluree |
| Slovak slovenčina | monurón (ISO) 3-(4-chlórfenyl)-1,1-dimetylmočovina |
| Slovenian slovenščina | monuron (ISO) 3-(4-klorofenil)-1,1-dimetilsečnina |
| Finnish suomi | monuroni (ISO) 3-(4-kloorifenyyli)-1,1-dimetyyliurea |
| Swedish svenska | monuron (ISO) 3-(4-klorfenyl)-1,1-dimetylurea |
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
Monuron GHS label elements
Everything CLP Annex VI fixes for Monuron, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Monuron
- Suspected of causing cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Harmful if swallowed.
- Very toxic to aquatic life.
- Very toxic to aquatic life with long lasting effects.
- Obtain special instructions before use.
- 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 exposed or concerned:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Get medical advice/attention.
- Rinse mouth.
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Monuron in the GHS label constructor →
07 · Health hazards
Monuron health hazards and exposure limits
Monuron hazard summary
Urea-derived herbicides have low toxicity in animal feeding studies; May induce methemoglobinemia; [HSDB] Systemic toxicity unlikely unless large amounts ingested; [EPA Pesticides, p. 122] Causes anemia and methemoglobinemia in animal experiments; [Merck Index]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Monuron carcinogenicity classification
Under the conditions of these 2-year feed studies, there was clear evidence of carcinogenicity for male F344/N rats in that monuron caused increased incidences of tubular cell adenocarcinomas of the kidney, tubular cell adenomas of the kidney, and neoplastic nodules or carcinomas (combined) of the liver. Monuron induced cytomegaly of the renal tubular epithelial cells in both male and female F344/N rats. There was no evidence of carcinogenicity for female F344/N rats or for male or female B6C3F1 mice.
Source: US National Toxicology Program · TR-266: Toxicology and Carcinogenesis Studies of Monuron (CASRN 150-68-5) in F344/N Rats and B6C3F1 Mice (Feed Studies) (1988 )
Evaluation: No data were available from studies in humans. There is limited evidence in experimental animals for the carcinogenicity of monuron. Overall evaluation: Monuron is not classifiable as to its carcinogenicity to humans (Group 3).
Source: Hazardous Substances Data Bank (HSDB)
An IARC group and a CLP classification answer different questions. IARC judges whether the evidence for cancer in humans is strong enough; CLP Annex VI is the legally binding EU classification. A substance can carry one and not the other.
08 · Physical and chemical properties
Monuron 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.
Monuron boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 192.5 °C (378.5 °F) | range, midpoint shown, at 760 mmHg | CAMEO |
Monuron melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 171 °C (339.8 °F) | range, midpoint shown | HSDB |
Monuron density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.27 g/cm³ | at 20 °C | HSDB |
Monuron solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | VERY SLIGHTLY SOL IN NUMBER 3 DIESEL OIL; MODERATELY SOL IN METHANOL, ETHANOL, PRACTICALLY INSOL IN HYDROCARBON SOLVENTS | HSDB | |
| SLIGHTLY SOL IN OIL & POLAR SOLVENTS | HSDB |
Monuron vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 502.541 mmHg | at 25 °C | HSDB |
| 5e-7 mmHg | at 25 °C | CAMEO | |
| 5e-7 mmHg | Haz-Map |
Monuron corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | NON-CORROSIVE | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Monuron 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.
Monuron fire potential
... NON-FLAMMABLE.
Source: Hazardous Substances Data Bank (HSDB)
Solubility
Monuron-TCA is a crystalline solid; mp 78-81 °C. Solubility (room temperature): 918 mg/l water; 400 g/kg 1,2-dichloroethane; 177 g/kg methanol; 91 g/kg xylene. It is acidic in reaction and incompatible with alkaline materials. /Monuron Trichloroacetate/
Source: HSDB
10 · Handling and storage
Monuron storage and handling
Monuron storage conditions
Keep in well ventilated area.
Source: Hazardous Substances Data Bank (HSDB)
Monuron reactivity
MONURON is a chlorinated urea derivative. May react with azo and diazo compounds to generate toxic gases. May react with strong reducing agents to generate flammable gases. Reacts as a weak base. Combustion generates mixed oxides of nitrogen (NOx).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Monuron in the storage compatibility matrix →
11 · Questions
Monuron — frequently asked questions
What is the CAS number of Monuron?
The CAS number of Monuron is 150-68-5. Its EC number is 205-766-1.
What is the chemical formula of Monuron?
The molecular formula of Monuron is C9H11ClN2O and its molecular weight is 198.65 g/mol.
What does a Monuron label have to show?
Under CLP Annex VI the label for Monuron carries the pictograms Health hazard, Exclamation mark and Environment and the signal word is Warning.
Is Monuron flammable?
CLP Annex VI assigns Monuron 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 Monuron a carcinogen?
CLP Annex VI assigns Monuron H351 — suspected of causing cancer. That is category 2: the evidence points that way but is not conclusive. IARC places it in Group 3: not classifiable as to its carcinogenicity to humans.
What is the boiling point of Monuron?
The boiling point reported for Monuron is 192.5 °C (378.5 °F), range, midpoint shown, at 760 mmHg (CAMEO).
What is the melting point of Monuron?
The melting point reported for Monuron is 171 °C (339.8 °F), range, midpoint shown (HSDB).
How should Monuron be stored?
Keep in well ventilated area. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Monuron
Keep going: substances starting with M, or search the whole database by name, CAS number, pictogram or signal word.