Substance profile
Divanadium pentaoxide
Divanadium pentaoxide is yellow to rust-brown orthorhombic crystals and is odorless.
01 · Identification
What Divanadium pentaoxide is
Divanadium pentaoxide is yellow to rust-brown orthorhombic crystals and is odorless. Its molecular formula is O5V2 and its molecular weight is 181.88 g/mol. It boils at 1750 °C, melts at 681 °C.
Under the GHS it carries the signal word Danger. It is classed as carcinogens.
02 · Identifiers
Divanadium pentaoxide identifiers and molecular data
Divanadium pentaoxide CAS number and EC number
Divanadium pentaoxide molecular formula and molecular weight
Other names for Divanadium pentaoxide
- vanadium pentoxide
03 · GHS classification
Divanadium pentaoxide hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Divanadium pentaoxide pictograms and signal word
Divanadium pentaoxide hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 3 | H301 | GHS06 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 1 or 2 | H330 | GHS06 |
| Germ cell mutagenicity GHS chapter 3.5 | Category 2 | H341 | GHS08 |
| Carcinogenicity GHS chapter 3.6 | Category 1A or 1B | H350 | GHS08 |
| Reproductive toxicity GHS chapter 3.7 | Category Lactation | H362 | — |
| Specific target organ toxicity - single exposure GHS chapter 3.8 | Category 3 | H335 | GHS07 |
| Specific target organ toxicity - repeated exposure GHS chapter 3.9 | Category 1 | H372 | GHS08 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 2 | H411 | 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.
Divanadium pentaoxide hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H341 | Suspected of causing genetic defects <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H350 | May cause cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H361fd | Suspected of damaging fertility. Suspected of damaging the unborn child. |
| H362 | May cause harm to breast-fed children. |
| H301 | Toxic if swallowed. |
| H330 | Fatal if inhaled. |
| H335 | May cause respiratory irritation. |
| H372 | Causes damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H411 | Toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to Divanadium pentaoxide. 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 Divanadium pentaoxide
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 Divanadium pentaoxide 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
Divanadium pentaoxide precautionary statements
CLP Annex VI assigns 15 precautionary statements to Divanadium pentaoxide. 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
Divanadium pentaoxide 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 | диванадиев пентаоксид ванадиев пентаоксид |
| Spanish español | Pentaóxido de divanadio pentaóxido de vanadio |
| Czech čeština | oxid vanadičný |
| Danish dansk | divanadiumpentaoxid vanadiumpentaoxid |
| German Deutsch | Divanadiumpentaoxid Vanadiumpentoxid |
| Estonian eesti | divanaadiumpentaoksiid vanaadiumpentoksiid |
| Greek ελληνικά | divanadium pentaoxide vanadium pentoxide |
| English English | divanadium pentaoxide vanadium pentoxide |
| French français | pentaoxyde de divanadium pentoxyde de vanadium |
| Croatian hrvatski | divanadijev pentoksid vanadijev pentoksid |
| Italian italiano | pentaossido di divanadio vanadio pentossido |
| Latvian latviešu | divanādija pentaoksīds vanādija pentoksīds |
| Lithuanian lietuvių | divanadžio pentoksidas vanadžio pentoksidas |
| Hungarian magyar | divanádium-pentoxid vanádium-pentoxid |
| Maltese Malti | pentaossidu tad-divanadju pentossidu tal-vanadju |
| Dutch Nederlands | divanadiumpentaoxide vanadiumpentaoxide |
| Polish polski | pentatlenek diwanadu pentatlenek wanadu |
| Portuguese português | pentóxido de divanádio pentóxido de vanádio |
| Romanian română | pentaoxid de divanadiu pentoxid de vanadiu |
| Slovak slovenčina | oxid vanadičný |
| Slovenian slovenščina | divanadijev pentaoksid vanadijev pentoksid |
| Finnish suomi | divanadiumpentoksidi vanadiumpentoksidi |
| Swedish svenska | divanadinpentoxid vanadinpentoxid |
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
Divanadium pentaoxide GHS label elements
Everything CLP Annex VI fixes for Divanadium pentaoxide, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Divanadium pentaoxide
- Suspected of causing genetic defects <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- May cause cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Suspected of damaging fertility. Suspected of damaging the unborn child.
- May cause harm to breast-fed children.
- Toxic if swallowed.
- Fatal if inhaled.
- May cause respiratory irritation.
- Causes damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Toxic to aquatic life with long lasting effects.
- Obtain special instructions before use.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Do not eat, drink or smoke when using this product.
- Use only outdoors or in a well-ventilated area.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- IF INHALED:
- IF exposed or concerned:
- Immediately call a POISON CENTER/doctor/…
- Get medical advice/attention.
- Get medical advice/attention if you feel unwell.
- 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 Divanadium pentaoxide in the GHS label constructor →
07 · Health hazards
Divanadium pentaoxide health hazards and exposure limits
Divanadium pentaoxide hazard summary
Chronic bronchitis has been described in boiler cleaners exposed to vanadium pentoxide. [ACGIH] Green tongue has been reported after local deposition, but it is not a sign of systemic poisoning. [Rosenstock, p. 988] The predominant symptom associated with exposure to vanadium oxide dust is bronchitis. Asthma has been documented in workers exposed to vanadium dust, vanadium pentoxide, and vanadate. [Harber, p. 505] Based on case reports, boilermaker's bronchitis is a form of asthma induced by exposure to vanadium in oil tank cleaners. [PMID 6332888; PMID 10086213] In lethal inhalation exposures of rabbits to particle sizes mainly <10 microns, it causes respiratory tract inflammation and pulmonary edema after 205 mg/m3 for 7 hours, but not to 77 mg/m3 for 7 hours or to 525 mg/m3 for 1 hour; [IPCS: Health and Safety Guide No. 42] Acute pneumonitis or pulmonary edema have not been reported after occupational exposure to vanadium; [Harber, Table 29-3, p. 487]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Divanadium pentaoxide carcinogenicity classification
Under the conditions of this 2-year inhalation study, there was some evidence of carcinogenic activity of vanadium pentoxide in male F344/N rats and equivocal evidence of carcinogenic activity of vanadium pentoxide in female F344/Nrats based on the occurrence of alveolar/bronchiolar neoplasms. There was clear evidence of carcinogenic activity of vanadium pentoxide in male and female B6C3F1 mice based on increased incidences of alveolar/bronchiolar neoplasms.
Source: US National Toxicology Program · TR-507: Toxicology and Carcinogenesis Studies of Vanadium Pentoxide (CASRN 1314-62-1) in F344/N Rats and B6C3F1 Mice (Inhalation Studies) (2002 )
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.
Divanadium pentaoxide occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 0.1 mg/m³ (fume); 0.5 mg/m³ (respirable dust) | Occupational Safety and Health Administration (OSHA) |
| PEL | C 0.1 mg V2O5/m3 See Appendix G | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 0.05 mg/m³ [15 minutes] | Occupational Safety and Health Administration (OSHA) |
| REL | C 0.05 mg V/m3 [15-minute] | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | 35 mg V/m3 (NIOSH, 2024) | CAMEO Chemicals |
| IDLH | 35.0 [mg/m3], as V | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| IDLH | 35 mg/m³ (as V) | Occupational Safety and Health Administration (OSHA) |
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
Divanadium pentaoxide 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.
Divanadium pentaoxide boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 1750 °C (3182 °F) | decomp | HSDB |
| 1750 °C (3182 °F) | at 760 mmHg | DOE PAC | |
| 1750 °C (3182 °F) | decomposes | NIOSH |
Divanadium pentaoxide melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 681 °C (1257.8 °F) | HSDB | |
| 690 °C (1274 °F) | NIOSH |
Divanadium pentaoxide density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 3.36 g/cm³ | NIOSH | |
| 3.654 g/cm³ | at 21.7 °C | HSDB | |
| 3.357 g/cm³ | at 18 °C | CAMEO |
Divanadium pentaoxide solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | 1 gram dissolves in approximately 125 mL water | HSDB | |
| In water, 904-935.8 mg/L at 20 °C and pH 2.7 | at 20 °C | HSDB | |
| In water, 0.07 g/100 g water at 25 °C | at 25 °C | HSDB |
Divanadium pentaoxide vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0 mmHg | approx | NIOSH |
| 0 mmHg | at 20 °C | HSDB |
Divanadium pentaoxide lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | A mixture of the metal and oxidant, contaminated with sulfur and some water led to a serious fire. | HSDB | |
| Noncombustible Solid | NIOSH | ||
| Not flammable. (EPA, 1998) | CAMEO |
Divanadium pentaoxide upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | Not flammable. (EPA, 1998) | CAMEO |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Divanadium pentaoxide 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.
Divanadium pentaoxide fire potential
Not combustible but will increase the intensity of an existing fire. ... Vanadium pentoxide itself does not burn, but dust may increase the intensity of fire when in contact with combustible materials.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Divanadium pentaoxide storage and handling
Divanadium pentaoxide safe storage
Separated from food and feedstuffs.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Divanadium pentaoxide storage conditions
Keep container tightly closed in a dry and well-ventilated place. Storage class (TRGS 510): Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects.
Source: Hazardous Substances Data Bank (HSDB)
Divanadium pentaoxide incompatible materials
Incompatible materials: Strong acids
Source: Hazardous Substances Data Bank (HSDB)
Divanadium pentaoxide reactivity
VANADIUM PENTOXIDE is acidic in many reactions. Hence, soluble in bases. [Kirk-Othmer]. Can react with ClF3, Li, peroxyformic acid and (Ca+S+H2O). Also reacts with strong acids. (NTP, 1992)
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Divanadium pentaoxide in the storage compatibility matrix →
11 · Transport
Divanadium pentaoxide 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.
Divanadium pentaoxide under UN 2862 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| VANADIUM PENTOXIDE, non- fused form | 6.1 | T5 | 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) |
|---|---|---|---|
| Vanadium pentoxide, non-fused form | 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
Divanadium pentaoxide — frequently asked questions
What is the CAS number of Divanadium pentaoxide?
The CAS number of Divanadium pentaoxide is 1314-62-1. Its EC number is 215-239-8.
What is the chemical formula of Divanadium pentaoxide?
The molecular formula of Divanadium pentaoxide is O5V2 and its molecular weight is 181.88 g/mol.
What does a Divanadium pentaoxide label have to show?
Under CLP Annex VI the label for Divanadium pentaoxide carries the pictograms Skull and crossbones, Health hazard and Environment and the signal word is Danger.
Is Divanadium pentaoxide flammable?
CLP Annex VI assigns Divanadium pentaoxide 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 Divanadium pentaoxide a carcinogen?
Yes. CLP Annex VI classifies Divanadium pentaoxide as a category 1A or 1B carcinogen and assigns it H350: may cause cancer. IARC places it in Group 2B: possibly carcinogenic to humans.
What is the exposure limit for Divanadium pentaoxide?
The US occupational exposure limit reported for Divanadium pentaoxide is 0.1 mg/m³ (fume); 0.5 mg/m³ (respirable dust) (Occupational Safety and Health Administration (OSHA)). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of Divanadium pentaoxide?
The boiling point reported for Divanadium pentaoxide is 1750 °C (3182 °F), decomp (HSDB).
What is the melting point of Divanadium pentaoxide?
The melting point reported for Divanadium pentaoxide is 681 °C (1257.8 °F) (HSDB).
How should Divanadium pentaoxide be stored?
Keep container tightly closed in a dry and well-ventilated place. Storage class (TRGS 510): Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects. (Hazardous Substances Data Bank (HSDB))
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