Substance profile
Azoxybenzene
Azoxybenzene is pale yellow orthorhombic needles.
01 · Identification
What Azoxybenzene is
Azoxybenzene is pale yellow orthorhombic needles. Its molecular formula is C12H10N2O and its molecular weight is 198.22 g/mol. It melts at 36 °C.
Under the GHS it carries the signal word Warning.
02 · Identifiers
Azoxybenzene identifiers and molecular data
Azoxybenzene CAS number and EC number
Azoxybenzene molecular formula and molecular weight
03 · GHS classification
Azoxybenzene hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Azoxybenzene pictograms and signal word
Azoxybenzene hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 4 | H332 | GHS07 |
Azoxybenzene hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H332 | Harmful if inhaled. |
| H302 | Harmful if swallowed. |
This page lists only the codes assigned to Azoxybenzene. 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 Azoxybenzene
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 Azoxybenzene 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
Azoxybenzene precautionary statements
CLP Annex VI assigns 7 precautionary statements to Azoxybenzene. 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.
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
Azoxybenzene 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 | азоксибензен |
| Spanish español | Azoxibenceno |
| Czech čeština | azoxybenzen |
| Danish dansk | azoxybenzen |
| German Deutsch | Azoxybenzol |
| Estonian eesti | asoksübenseen |
| Greek ελληνικά | αζωξυβενζόλιο |
| English English | azoxybenzene |
| French français | azoxybenzène |
| Croatian hrvatski | azoksibenzen |
| Italian italiano | azossibenzene |
| Latvian latviešu | azoksibenzols |
| Lithuanian lietuvių | azoksibenzenas |
| Hungarian magyar | azoxibenzol |
| Maltese Malti | ażossibenżen |
| Dutch Nederlands | azoxybenzeen |
| Polish polski | azoksybenzen tlenek difenylodiazenu |
| Portuguese português | azoxibenzeno |
| Romanian română | azoxibenzen |
| Slovak slovenčina | difenyldiazén-oxid |
| Slovenian slovenščina | azoksibenzen |
| Finnish suomi | atsoksibentseeni |
| Swedish svenska | azoxibensen |
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
Azoxybenzene GHS label elements
Everything CLP Annex VI fixes for Azoxybenzene, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Azoxybenzene
- Harmful if inhaled.
- Harmful if swallowed.
- 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.
- IF SWALLOWED:
- IF INHALED:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Rinse mouth.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Azoxybenzene in the GHS label constructor →
07 · Health hazards
Azoxybenzene health hazards and exposure limits
Azoxybenzene hazard summary
External application to rabbit eyes scored 1 on a scale of 1-10 (10 being most severe) for degree of injury after 24 hours; Causes icteric skin, methemoglobinemia, swelling of liver and spleen, and atrophy of testis and epididymis in oral studies of rats and mice; Emergency treatment: Methemoglobinemia; [HSDB] Dust mixtures with air may be explosive; A skin and eye irritant; May cause liver and kidney injury; [CAMEO] Causes decrease in cellular immune response in intraperitoneal toxic-dose studies of rats; Causes other GI and liver changes in oral lethal-dose studies of mice; [RTECS] May cause irritation and methemoglobinemia; [Alfa Aesar MSDS]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Azoxybenzene 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.
Azoxybenzene boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | Decomposes (NTP, 1992) | decomposes | CAMEO |
Azoxybenzene melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 36 °C (96.8 °F) | HSDB | |
| 36.11 °C (97 °F) | CAMEO |
Azoxybenzene density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.159 g/cm³ | at 26 °C | HSDB |
| 1.159 g/cm³ | at 26.11 °C | CAMEO |
Azoxybenzene solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | less than 1 mg/mL at 68 °F (NTP, 1992) | at 20 °C | CAMEO |
| INSOL IN WATER; SOL IN ALCOHOL & ETHER; 43.5 G DISSOLVE IN 100 G PETROLEUM ETHER @ 15 °C | at 15 °C | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Azoxybenzene 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.
Azoxybenzene fire potential
SLIGHTLY DANGEROUS...
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Azoxybenzene storage and handling
Azoxybenzene storage conditions
MATERIALS WHICH ARE TOXIC AS STORED OR WHICH CAN DECOMPOSE INTO TOXIC COMPONENTS...SHOULD BE STORED IN A COOL WELL VENTILATED PLACE, OUT OF DIRECT RAYS OF THE SUN, AWAY FROM AREAS OF HIGH FIRE HAZARD, AND SHOULD BE PERIODICALLY INSPECTED... INCOMPATIBLE MATERIALS SHOULD BE ISOLATED...
Source: Hazardous Substances Data Bank (HSDB)
Azoxybenzene reactivity
AZOXYBENZENE is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Azoxybenzene in the storage compatibility matrix →
11 · Questions
Azoxybenzene — frequently asked questions
What is the CAS number of Azoxybenzene?
The CAS number of Azoxybenzene is 495-48-7. Its EC number is 207-802-1.
What is the chemical formula of Azoxybenzene?
The molecular formula of Azoxybenzene is C12H10N2O and its molecular weight is 198.22 g/mol.
What does a Azoxybenzene label have to show?
Under CLP Annex VI the label for Azoxybenzene carries the pictogram Exclamation mark and the signal word is Warning.
Is Azoxybenzene flammable?
CLP Annex VI assigns Azoxybenzene 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 Azoxybenzene a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Azoxybenzene. 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 Azoxybenzene?
The boiling point reported for Azoxybenzene is Decomposes (NTP, 1992), decomposes (CAMEO).
What is the melting point of Azoxybenzene?
The melting point reported for Azoxybenzene is 36 °C (96.8 °F) (HSDB).
How should Azoxybenzene be stored?
MATERIALS WHICH ARE TOXIC AS STORED OR WHICH CAN DECOMPOSE INTO TOXIC COMPONENTS...SHOULD BE STORED IN A COOL WELL VENTILATED PLACE, OUT OF DIRECT RAYS OF THE SUN, AWAY FROM AREAS OF HIGH FIRE HAZARD, AND SHOULD BE PERIODICALLY INSPECTED... INCOMPATIBLE MATERIALS SHOULD BE ISOLATED... (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Azoxybenzene
Keep going: substances starting with A, or search the whole database by name, CAS number, pictogram or signal word.