Substance profile
DNOC (ISO)
DNOC (ISO) is yellow prisms or needles from alcohol and is odorless.
01 · Identification
What DNOC (ISO) is
DNOC (ISO) is yellow prisms or needles from alcohol and is odorless. Its molecular formula is C7H6N2O5 and its molecular weight is 198.13 g/mol. It boils at 312 °C, melts at 86 °C.
Under the GHS it carries the signal word Danger. It is classed as hazardous Air Pollutants (HAPs).
02 · Identifiers
DNOC (ISO) identifiers and molecular data
DNOC (ISO) CAS number and EC number
DNOC (ISO) molecular formula and molecular weight
Other names for DNOC (ISO)
- 4,6-dinitro-o-cresol
03 · GHS classification
DNOC (ISO) hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
DNOC (ISO) pictograms and signal word
DNOC (ISO) hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 1 or 2 | H300 | GHS06 |
| Acute toxicity - dermal GHS chapter 3.1 | Category 1 or 2 | H310 | GHS06 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 1 or 2 | H330 | GHS06 |
| Skin corrosion/irritation GHS chapter 3.2 | Category 2 | H315 | GHS07 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 1 | H318 | GHS05 |
| Skin sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H317 | GHS07 |
| Germ cell mutagenicity GHS chapter 3.5 | Category 2 | H341 | 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 |
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.
DNOC (ISO) 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>. |
| H310 | Fatal in contact with skin. |
| H330 | Fatal if inhaled. |
| H300 | Fatal if swallowed. |
| H315 | Causes skin irritation. |
| H318 | Causes serious eye damage. |
| H317 | May cause an allergic skin reaction. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
DNOC (ISO) supplemental EU statements (EUH)
| Code | Statement |
|---|---|
| EUH044 | Risk of explosion if heated under confinement. |
This page lists only the codes assigned to DNOC (ISO). 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 DNOC (ISO)
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 DNOC (ISO) 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
DNOC (ISO) precautionary statements
CLP Annex VI assigns 23 precautionary statements to DNOC (ISO). 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
DNOC (ISO) 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 | DNOC (ISO) 4,6-динитро- o -крезол |
| Spanish español | DNOC (ISO) 4,6-dinitro- o -cresol |
| Czech čeština | DNOC (ISO) 4,6-dinitro- o -kresol |
| Danish dansk | DNOC (ISO) 4,6-dinitro- o -cresol |
| German Deutsch | DNOC (ISO) 4,6-Dinitro- o -kresol |
| Estonian eesti | DNOC (ISO) 4,6-dinitro- o -kresool |
| Greek ελληνικά | DNOC (ISO) 4,6-δινιτρο- o -κρεσόλη |
| English English | DNOC (ISO) 4,6-dinitro- o -cresol |
| French français | DNOC (ISO) 4,6-dinitro- o -crésol |
| Croatian hrvatski | DNOC (ISO) 4,6-dinitro- o -krezol |
| Italian italiano | DNOC (ISO) 4,6-dinitro- o -cresolo |
| Latvian latviešu | DNOC (ISO) 4,6-dinitro- o -krezols |
| Lithuanian lietuvių | DNOC (ISO) 4,6-dinitro- o -krezolis |
| Hungarian magyar | DNOC (ISO) 4,6-dinitro- o -krezol |
| Maltese Malti | DNOC (ISO) 4,6-dinitro- o -kreżol |
| Dutch Nederlands | DNOC (ISO) 4,6-dinitro- o -cresol |
| Polish polski | DNOK (ISO) 4,6-dinitro- o -krezol2-metylo-4,6-dinitrofenol |
| Portuguese português | DNOC (ISO) 4,6-dinitro- o -cresol |
| Romanian română | DNOC (ISO) 4,6-dinitro- o -crezol |
| Slovak slovenčina | DNOC (ISO) 2-metyl-4,6-dinitrofenol |
| Slovenian slovenščina | DNOC (ISO) 4,6-dinitro- o -krezol |
| Finnish suomi | DNOC (ISO) 4,6-dinitro- o -kresoli |
| Swedish svenska | DNOC (ISO) 4,6-dinitro- o -kresol |
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
DNOC (ISO) GHS label elements
Everything CLP Annex VI fixes for DNOC (ISO), laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
DNOC (ISO)
- Suspected of causing genetic defects <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Fatal in contact with skin.
- Fatal if inhaled.
- Fatal if swallowed.
- Causes skin irritation.
- Causes serious eye damage.
- May cause an allergic skin reaction.
- Very toxic to aquatic life.
- Very toxic to aquatic life with long lasting effects.
- Risk of explosion if heated under confinement.
- Obtain special instructions before use.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Wash … thoroughly after handling.
- Do not eat, drink or smoke when using this product.
- 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 SWALLOWED:
- IF ON SKIN:
- IF INHALED:
- IF IN EYES:
- IF exposed or concerned:
- Immediately call a POISON CENTER/doctor/…
- Get medical advice/attention.
- Rinse mouth.
- If skin irritation occurs:
- If skin irritation or rash occurs:
- Remove contact lenses, if present and easy to do. Continue rinsing.
- Wash with plenty of water/…
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open DNOC (ISO) in the GHS label constructor →
07 · Health hazards
DNOC (ISO) health hazards and exposure limits
DNOC (ISO) hazard summary
4,6-Dinitro-o-cresol (DNOC) was used as a pesticide until 1991. It is extremely toxic to humans. Symptoms of acute (short-term) and chronic (long-term) toxicity include profuse sweating, increased pulse and respiratory rates, thirst, fatigue, headache, appetite loss, and greenish-yellow pigmentation of the conjunctivae in humans. Bilateral cataracts and blindness have been observed in individuals chronically exposed to DNOC by ingestion. Effects to the respiratory, cardiovascular, gastrointestinal, and central nervous system (CNS) of chronically exposed workers have been reported. No information is available on the reproductive, developmental, or carcinogenic effects of DNOC in humans. EPA has not classified DNOC for potential carcinogenicity.
Source: EPA Hazardous Air Pollutants
DNOC (ISO) occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| IDLH | 5 mg/m3 (NIOSH, 2024) | CAMEO Chemicals |
| IDLH | 5 mg/cu m | 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
DNOC (ISO) 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.
DNOC (ISO) boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 312 °C (593.6 °F) | HSDB | |
| 312.22 °C (594 °F) | at 760 mmHg | CAMEO | |
| 220 °C (428 °F) | at 760 mmHg | DOE PAC |
DNOC (ISO) melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 86 °C (186.8 °F) | HSDB | |
| 87.78 °C (190 °F) | CAMEO | ||
| 86.5 °C (187.7 °F) | DOE PAC |
DNOC (ISO) density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.58 g/cm³ | at 20 °C | HSDB |
| 1.1 g/cm³ | at 20 °C, est | CAMEO |
DNOC (ISO) solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Slightly soluble in water | HSDB | |
| Slightly soluble in petroleum ether; soluble in ethanol, ether, acetone, chloroform | HSDB | ||
| In water, 198 mg/L at 20 °C | at 20 °C | HSDB |
DNOC (ISO) vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.00005 mmHg | CAMEO | |
| 0.00012 mmHg | at 25 °C | HSDB |
DNOC (ISO) flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | None (EPA, 1998) | CAMEO |
DNOC (ISO) lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | ...Pure DNOC, but not tech., is explosive when dry. | HSDB | |
| In dry conditions, salts tend to detonate, and so they are usually moistened with up to 10% water in order to reduce the risk of explosion. | DNOC salts | HSDB |
DNOC (ISO) vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 6.84 (air = 1) | HSDB | |
| 6.82 (air = 1) | CAMEO |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
DNOC (ISO) storage and handling
DNOC (ISO) storage conditions
Keep container tightly closed in a dry and well-ventilated place.
Source: Hazardous Substances Data Bank (HSDB)
DNOC (ISO) incompatible materials
Incompatible materials: Strong oxidizing agents.
Source: Hazardous Substances Data Bank (HSDB)
DNOC (ISO) reactivity
Phenols do not behave as organic alcohols, as one might guess from the presence of a hydroxyl (-OH) group in their structure. Instead, they react as weak organic acids. Phenols and cresols are much weaker as acids than common carboxylic acids (phenol has pKa = 9.88). These materials are incompatible with strong reducing substances such as hydrides, nitrides, alkali metals, and sulfides. Flammable gas (H2) is often generated, and the heat of the reaction may ignite the gas. Heat is also generated by the acid-base reaction between phenols and bases.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check DNOC (ISO) in the storage compatibility matrix →
10 · Questions
DNOC (ISO) — frequently asked questions
What is the CAS number of DNOC (ISO)?
The CAS number of DNOC (ISO) is 534-52-1. Its EC number is 208-601-1.
What is the chemical formula of DNOC (ISO)?
The molecular formula of DNOC (ISO) is C7H6N2O5 and its molecular weight is 198.13 g/mol.
What does a DNOC (ISO) label have to show?
Under CLP Annex VI the label for DNOC (ISO) carries the pictograms Skull and crossbones, Health hazard, Corrosion, Exclamation mark and Environment and the signal word is Danger.
Is DNOC (ISO) flammable?
CLP Annex VI assigns DNOC (ISO) 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. The flash point reported for it is None (EPA, 1998) (CAMEO).
Is DNOC (ISO) a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for DNOC (ISO). 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 DNOC (ISO)?
The boiling point reported for DNOC (ISO) is 312 °C (593.6 °F) (HSDB).
What is the melting point of DNOC (ISO)?
The melting point reported for DNOC (ISO) is 86 °C (186.8 °F) (HSDB).
How should DNOC (ISO) be stored?
Keep container tightly closed in a dry and well-ventilated place. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to DNOC (ISO)
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