Substance profile
Maneb
Maneb is yellow powder; crystals from alcohol and is odorless.
01 · Identification
What Maneb is
Maneb is yellow powder; crystals from alcohol and is odorless. Its molecular formula is C4H6MnN2S4 and its molecular weight is 265.3 g/mol. It melts at 200 °C, is soluble in water.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 3rd degree.
02 · Identifiers
Maneb identifiers and molecular data
Maneb CAS number and EC number
Maneb molecular formula and molecular weight
Other names for Maneb
- maneb (ISO)
- manganese ethylenebis(dithiocarbamate) (polymeric)
03 · GHS classification
Maneb hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Maneb pictograms and signal word
Maneb hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - inhalation GHS chapter 3.1 | Category 4 | H332 | GHS07 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 2A | H319 | GHS07 |
| Skin sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H317 | GHS07 |
| 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.
Maneb hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H361d | Suspected of damaging the unborn child. |
| H332 | Harmful if inhaled. |
| H319 | Causes serious eye irritation. |
| H317 | May cause an allergic skin reaction. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to Maneb. 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 Maneb
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 Maneb 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
Maneb precautionary statements
CLP Annex VI assigns 16 precautionary statements to Maneb. 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
Maneb 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 | манеб (ISO) манганов етиленбис(дитиокарбамат) (полимерен) |
| Spanish español | Maneb (ISO) etilen-bis(ditiocarbamato) (polimérico) de manganeso |
| Czech čeština | maneb (ISO) N, N' -ethylenbis(dithiokarbamát) manganatý (polymerní) |
| Danish dansk | maneb (ISO) manganethylenbis(dithiocarbamat) (polymer) |
| German Deutsch | Maneb (ISO) Manganethylenbis(dithiocarbamat) (Polymer) |
| Estonian eesti | maneeb (ISO) mangaanetüleenbis(ditiokarbamaat) (polümeerne) |
| Greek ελληνικά | maneb (μανέμπ) (ISO) μαγγάνιο, αιθυλενοδις(διθειοκαρβαμιδικό) (πολυμερές) |
| English English | maneb (ISO) manganese ethylenebis(dithiocarbamate) (polymeric) |
| French français | manèbe (ISO) éthylènebis(dithiocarbamate) de manganèse (polymère) |
| Croatian hrvatski | maneb (ISO) manganov etilenbis(ditiokarbamat) (polimerni) |
| Italian italiano | maneb (ISO) etilenebis(ditiocarbammato) (polimerico) di manganese |
| Latvian latviešu | manebs (ISO) mangānetilēnbis(ditiokarbamāts) (polimērs) |
| Lithuanian lietuvių | manebas (ISO) mangano etilenbis(ditiokarbamatas) (polimeras) |
| Hungarian magyar | maneb (ISO) mangán etilén-bisz(ditiokarbamát) (polimer) |
| Maltese Malti | maneb (ISO) manganiż etilenebis(ditijokarbamat) (polimeriku) |
| Dutch Nederlands | maneb (ISO) mangaanethyleenbis(dithiocarbamaat) (polymeer) |
| Polish polski | maneb (ISO) polimeryczny etylenobis (ditiokarbaminian) manganu |
| Portuguese português | manebe (ISO) etilenobis(ditiocarbamato) de manganês polimérico |
| Romanian română | maneb (ISO) mangan etilenbis(ditiocarbamat) (polimer) |
| Slovak slovenčina | maneb (ISO) polymérny mangánium-etylénbis (ditiokarbamátu) |
| Slovenian slovenščina | maneb (ISO) manganov etilenbis(ditiokarbamat) (polimerni) |
| Finnish suomi | manebi (ISO) mangaanietyleenibis(ditiokarbamaatti) (polymeerinen) |
| Swedish svenska | maneb (ISO) mangan etylenbis(ditiokarbamat) (polymer) |
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
Maneb GHS label elements
Everything CLP Annex VI fixes for Maneb, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Maneb
- Suspected of damaging the unborn child.
- Harmful if inhaled.
- Causes serious eye irritation.
- May cause an allergic skin reaction.
- Very toxic to aquatic life.
- Very toxic to aquatic life with long lasting effects.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Wash … thoroughly after handling.
- Use only outdoors or in a well-ventilated area.
- Contaminated work clothing should not be allowed out of the workplace.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF INHALED:
- IF IN EYES:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Get medical advice/attention.
- If skin irritation or rash occurs:
- If eye irritation persists:
- Remove contact lenses, if present and easy to do. Continue rinsing.
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Maneb in the GHS label constructor →
07 · Health hazards
Maneb health hazards and exposure limits
Maneb carcinogenicity classification
No data are available in humans. Inadequate evidence of carcinogenicity in animals. OVERALL EVALUATION: Group 3: The agent is not classifiable as to its carcinogenicity to humans.
Source: Hazardous Substances Data Bank (HSDB)
Historically, it has been assumed that maneb's potential for carcinogenicity (as well as that of the other EBDCs, metiram and mancozeb) is due to the formation of the metabolite ETU, which is classified as a probable human carcinogen (B2) ... . On this basis, maneb cancer risk has been calculated by estimating exposure to maneb-derived ETU (including the metabolic conversion) and using the ETU cancer potency factor to provide a quantitative estimate of risk. In a 1999 Review, the /USSEPA/ concluded that cancer risk for maneb and the other EBDCs should continue to be evaluated in this way.
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.
Maneb occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| IDLH | 500 mg/cu m /Manganese cmpds and fume, as Mn/ | Hazardous Substances Data Bank (HSDB) |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · Physical and chemical properties
Maneb 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.
Maneb melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 200 °C (392 °F) | OSHA | |
| 200 °C (392 °F) | decomposes, decomposes | HSDB |
Maneb density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.92 g/cm³ | ICSC | |
| 1.92 g/cm³ | at 25 °C | HSDB |
Maneb solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Soluble in chloroform, pyridine | HSDB |
Maneb vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 7.5e-8 mmHg | OSHA | |
| 7.5e-8 mmHg | at 25 °C | HSDB | |
| 8e-8 mmHg | Haz-Map |
Maneb vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 1.92 (air = 1) | OSHA |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Maneb 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.
Maneb fire potential
May ignite spontaneously in air.
Source: Hazardous Substances Data Bank (HSDB)
Solubility
Practically insoluble in common organic solvents. Soluble in chelating agents (e.g. sodium salts of ethylenediaminetetraacetic acid) with the formation of complexes.
Source: HSDB
10 · Handling and storage
Maneb storage and handling
Maneb safe storage
Separated from acids and food and feedstuffs. Dry. Well closed. Keep in a well-ventilated room. Store only if stabilized.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Maneb storage conditions
This product must be stored in its sealed original containers, in well-aired places. It is recommended that the product's temperature should not exceed 25-30 °C. The containers must be stacked in such a way as to permit a free circulation of air also at the bottom & inside of the piles.
Source: Hazardous Substances Data Bank (HSDB)
Maneb incompatible materials
Water, acid, oxidizing materials. Heat or contact with moisture or acids causes rapid decomposition and the generation of toxic and flammable hydrogen sulfide and carbon disulfide.
Source: Hazardous Substances Data Bank (HSDB)
Maneb reactivity
The BPS Pesticide incident in Helena resulted in an explosion and death of three firemen. The burning of a 1,000 pound sack of Azinphos Methyl or the flashing of Maneb which was present on the facility may have caused the explosion.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Maneb in the storage compatibility matrix →
11 · Transport
Maneb 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.
The same CAS number is shipped under more than one UN number. Which entry applies follows from the form and the concentration of the consignment — read the proper shipping name, not the CAS.
Maneb under UN 2210 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| MANEB or MANEB PREPARATION with not less than 60 % maneb | 4.2 | SW1 | III | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 4.2 is “Substances liable to spontaneous combustion” (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) |
|---|---|---|---|
| Maneb or Maneb preparations with not less than 60 percent maneb | 4.2 | III | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 4.2 is “Spontaneously combustible material” (49 CFR 173.2).
Maneb under UN 2968 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| MANEB, STABILIZED or MANEB PREPARATION, STABILIZED against self-heating | 4.3 | W2 | III | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 4.3 is “Substances which, in contact with water, emit flammable gases” (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) |
|---|---|---|---|
| Maneb stabilized or Maneb preparations, stabilized against self-heating | 4.3 | III | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 4.3 is “Dangerous when wet material” (49 CFR 173.2).
12 · Questions
Maneb — frequently asked questions
What is the CAS number of Maneb?
The CAS number of Maneb is 12427-38-2. Its EC number is 235-654-8.
What is the chemical formula of Maneb?
The molecular formula of Maneb is C4H6MnN2S4 and its molecular weight is 265.3 g/mol.
What does a Maneb label have to show?
Under CLP Annex VI the label for Maneb carries the pictograms Health hazard, Exclamation mark and Environment and the signal word is Warning.
Is Maneb flammable?
CLP Annex VI assigns Maneb 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 Maneb a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Maneb. 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. IARC places it in Group 3: not classifiable as to its carcinogenicity to humans.
What is the melting point of Maneb?
The melting point reported for Maneb is 200 °C (392 °F) (OSHA).
How should Maneb be stored?
This product must be stored in its sealed original containers, in well-aired places. It is recommended that the product's temperature should not exceed 25-30 °C. The containers must be stacked in such a way as to permit a free circulation of air also at the bottom & inside of the piles. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Maneb
Keep going: substances starting with M, or search the whole database by name, CAS number, pictogram or signal word.