Substance profile
4-Nitrosophenol
4-Nitrosophenol is pale yellow orthorhombic needles, browns @ 126 °c.
01 · Identification
What 4-Nitrosophenol is
4-Nitrosophenol is pale yellow orthorhombic needles, browns @ 126 °c. Its molecular formula is C6H5NO2 and its molecular weight is 123.11 g/mol. It melts at 138 °C.
Under the GHS it carries the signal word Danger.
02 · Identifiers
4-Nitrosophenol identifiers and molecular data
4-Nitrosophenol CAS number and EC number
4-Nitrosophenol molecular formula and molecular weight
03 · GHS classification
4-Nitrosophenol hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
4-Nitrosophenol pictograms and signal word
4-Nitrosophenol hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 1 | H318 | GHS05 |
| Germ cell mutagenicity GHS chapter 3.5 | Category 2 | H341 | GHS08 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 2 | H411 | GHS09 |
4-Nitrosophenol 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>. |
| H302 | Harmful if swallowed. |
| H318 | Causes serious eye damage. |
| H411 | Toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to 4-Nitrosophenol. 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 4-Nitrosophenol
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 4-Nitrosophenol 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
4-Nitrosophenol precautionary statements
CLP Annex VI assigns 14 precautionary statements to 4-Nitrosophenol. 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
4-Nitrosophenol 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 | 4-нитрозофенол |
| Spanish español | 4-Nitrosofenol |
| Czech čeština | 4-nitrosofenol |
| Danish dansk | 4-nitrosophenol |
| German Deutsch | 4-Nitrosophenol |
| Estonian eesti | 4-nitrosofenool |
| Greek ελληνικά | 4-νιτρωδοφαινόλη |
| English English | 4-nitrosophenol |
| French français | 4-nitrosophénol |
| Croatian hrvatski | 4-nitrozofenol |
| Italian italiano | 4-nitrosofenolo |
| Latvian latviešu | 4-nitrozofenols |
| Lithuanian lietuvių | 4-nitrozofenolis |
| Hungarian magyar | 4-nitrozofenol |
| Maltese Malti | 4-nitrosofenol |
| Dutch Nederlands | 4-nitrosofenol |
| Polish polski | 4-nitrozofenol |
| Portuguese português | 4-nitrosofenol |
| Romanian română | 4-nitrozofenol |
| Slovak slovenčina | 4-nitrózofenol |
| Slovenian slovenščina | 4-nitrozofenol |
| Finnish suomi | 4-nitrosofenoli |
| Swedish svenska | 4-nitrosofenol |
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
4-Nitrosophenol GHS label elements
Everything CLP Annex VI fixes for 4-Nitrosophenol, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
4-Nitrosophenol
- Suspected of causing genetic defects <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Harmful if swallowed.
- Causes serious eye damage.
- 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 IN EYES:
- IF exposed or concerned:
- Immediately call a POISON CENTER/doctor/…
- Call a POISON CENTER/doctor/… if you feel unwell.
- Get medical advice/attention.
- Rinse mouth.
- 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 4-Nitrosophenol in the GHS label constructor →
07 · Physical and chemical properties
4-Nitrosophenol 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.
4-Nitrosophenol melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 138.06 °C (280.5 °F) | range, midpoint shown | CAMEO |
4-Nitrosophenol solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | MODERATELY SOL IN WATER; SOL IN DILUTE ALKALIES GIVING GREEN TO BROWNISH GREEN SOLUTIONS; SOL IN ALC, ETHER, ACETONE | HSDB | |
| SOL IN HOT BENZENE | HSDB | ||
| less than 1 mg/mL at 70 °F (NTP, 1992) | at 21.11 °C | CAMEO |
4-Nitrosophenol vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.15 mmHg | Haz-Map |
4-Nitrosophenol lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | EXPLODES ON CONTACT WITH CONCN ACID, ALKALI, OR FIRE. A TECHNICAL GRADE EXPLODED ON STORAGE. | HSDB | |
| DANGEROUS...EXPLOSION RISK...MAY EXPLODE SPONTANEOUSLY. | HSDB | ||
| NITROSOPHENOL EXPLODES ON HEATING... | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
08 · Fire and explosion
4-Nitrosophenol 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.
4-Nitrosophenol fire potential
STORED BARRELS HEATED SPONTANEOUSLY & CAUSED A FIRE. CONTAMINATION OF THE BULK MATERIAL BY ACID OR ALKALI MAY CAUSE IGNITION. THE TENDENCY TO SPONTANEOUS IGNITION WAS FOUND TO BE ASSOCIATED WITH THE PRESENCE OF NITRATES IN SODIUM NITRITE USED IN PREPARATION.
Source: Hazardous Substances Data Bank (HSDB)
09 · Handling and storage
4-Nitrosophenol storage and handling
4-Nitrosophenol reactivity
P-BENZOQUINONE MONOXIME explodes when heated. Explodes on contact with acid, alkali (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 4-Nitrosophenol in the storage compatibility matrix →
10 · Questions
4-Nitrosophenol — frequently asked questions
What is the CAS number of 4-Nitrosophenol?
The CAS number of 4-Nitrosophenol is 104-91-6. Its EC number is 203-251-6.
What is the chemical formula of 4-Nitrosophenol?
The molecular formula of 4-Nitrosophenol is C6H5NO2 and its molecular weight is 123.11 g/mol.
What does a 4-Nitrosophenol label have to show?
Under CLP Annex VI the label for 4-Nitrosophenol carries the pictograms Health hazard, Corrosion, Exclamation mark and Environment and the signal word is Danger.
Is 4-Nitrosophenol flammable?
CLP Annex VI assigns 4-Nitrosophenol 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 4-Nitrosophenol a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 4-Nitrosophenol. 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 melting point of 4-Nitrosophenol?
The melting point reported for 4-Nitrosophenol is 138.06 °C (280.5 °F), range, midpoint shown (CAMEO).
Nearby
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