Substance profile
Mequinol
Mequinol is plates with an odor of caramel and phenol.
01 · Identification
What Mequinol is
Mequinol is plates with an odor of caramel and phenol. Its molecular formula is C7H8O2 and its molecular weight is 124.14 g/mol. It boils at 253 °C, melts at 54 °C.
Under the GHS it carries the signal word Warning.
02 · Identifiers
Mequinol identifiers and molecular data
Mequinol CAS number and EC number
Mequinol molecular formula and molecular weight
Other names for Mequinol
- 4-methoxyphenol
- hydroquinone monomethyl ether
03 · GHS classification
Mequinol hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Mequinol pictograms and signal word
Mequinol 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 2A | H319 | GHS07 |
| Skin sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H317 | GHS07 |
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.
Mequinol hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H302 | Harmful if swallowed. |
| H319 | Causes serious eye irritation. |
| H317 | May cause an allergic skin reaction. |
This page lists only the codes assigned to Mequinol. 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 Mequinol
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 Mequinol 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
Mequinol precautionary statements
CLP Annex VI assigns 13 precautionary statements to Mequinol. 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
Mequinol 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 | мехинол 4-метоксифенолмонометилов етер на хидрохинона |
| Spanish español | Mequinol 4-metoxifenoléter monometílico de hidroquinona |
| Czech čeština | mechinol 4-methoxyfenolhydrochinonmonomethylether |
| Danish dansk | mequinol 4-methoxyphenolhydroquinon monomethylether |
| German Deutsch | Mequinol 4-MethoxyphenolHydrochinonmonomethylether |
| Estonian eesti | mekinool 4-metoksüfenoolhüdrokinooni monometüüleeter |
| Greek ελληνικά | μεκινόλη 4-μεθοξυφαινόλημονομεθυλαιθέρας υδροκινόνης |
| English English | mequinol 4-methoxyphenolhydroquinone monomethyl ether |
| French français | méquinol 4-méthoxyphénoléther monométhylique de l'hydroquinone |
| Croatian hrvatski | mekinol 4-metoksifenolhidrokinon-monometil-eter |
| Italian italiano | mechinolo 4-metossifenoloidrochinone monometiletere |
| Latvian latviešu | mehinols 4-metoksifenolshidrohinona monometilēteris |
| Lithuanian lietuvių | mechinolis 4-metoksifenolishidrochinono monometileteris |
| Hungarian magyar | mekvinol 4-metoxifenolhidrokinon-monometil-éter |
| Maltese Malti | mekinol 4-metossifenoleter tal-monometil tal-idrokinon |
| Dutch Nederlands | mequinol 4-methoxyfenolhydrochinonmonomethylether |
| Polish polski | mekwinol 4-metoksyfenoleter monometylowy hydrochinonueter 4-hydroksyfenylowo-metylowy |
| Portuguese português | mequinol 4-metoxifenoléter monometílico de hidroquinona |
| Romanian română | mechinol 4-metoxifenoleterul monometilic al hidrochinonei |
| Slovak slovenčina | mechinol 4-metoxyfenolhydrochinón-monometyléter |
| Slovenian slovenščina | mekinol 4-metoksifenolhidrokinon monometil eter |
| Finnish suomi | mekvinoli 4-metoksifenolihydrokinonimonometyylieetteri |
| Swedish svenska | mekinol 4-metoxifenolhydrokinonmonometyleter |
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
Mequinol GHS label elements
Everything CLP Annex VI fixes for Mequinol, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Mequinol
- Harmful if swallowed.
- Causes serious eye irritation.
- May cause an allergic skin reaction.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Wash … thoroughly after handling.
- Do not eat, drink or smoke when using this product.
- Contaminated work clothing should not be allowed out of the workplace.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- IF IN EYES:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Get medical advice/attention.
- Rinse mouth.
- If skin irritation or rash occurs:
- If eye irritation persists:
- Remove contact lenses, if present and easy to do. Continue rinsing.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Mequinol in the GHS label constructor →
07 · Health hazards
Mequinol health hazards and exposure limits
Mequinol hazard summary
Can cause leukoderma (depigmentation of skin); [LaDou, p. 328] Symptoms: Irritation eyes, skin, nose, throat, upper respiratory system; eye, skin burns; central nervous system depression; [CAMEO] A skin and eye irritant and can cause depigmentation of the skin; A potential skin sensitizer; [ICSC]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Mequinol occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | none See Appendix G | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 5 mg/m³ | Occupational Safety and Health Administration (OSHA) |
| REL | TWA 5 mg/m3 | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | N.D. | The National Institute for Occupational Safety and Health (NIOSH) |
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
Mequinol 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.
Mequinol boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 253 °C (487.4 °F) | HSDB | |
| 242.78 °C (469 °F) | NIOSH | ||
| 246.11 °C (475 °F) | at 760 mmHg | CAMEO |
Mequinol melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 54 °C (129.2 °F) | HSDB | |
| 57.22 °C (135 °F) | NIOSH | ||
| 52.5 °C (126.5 °F) | CAMEO |
Mequinol density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.55 g/cm³ | NIOSH | |
| 1.55 g/cm³ | at 20 °C | HSDB |
Mequinol solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Soluble in benzene, carbon tetrachloride; very soluble in ethanol, ether | HSDB | |
| In water, 19,500 mg/L at 25 °C | at 25 °C | HSDB | |
| In water, 40,000 mg/L at 25 °C | at 25 °C | HSDB |
Mequinol vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.0067 mmHg | at 20 °C | HSDB |
| 0.01 mmHg | below this value | NIOSH |
Mequinol flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 132.22 °C (270 °F) | HSDB | |
| 132 °C (269.6 °F) | CAMEO |
Mequinol autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 421.11 °C (790 °F) | HSDB | |
| 421 °C (789.8 °F) | ICSC |
Mequinol lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Combustible Solid; under certain conditions, a dust cloud can probably explode if ignited by a spark or flame. | NIOSH |
Mequinol vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 4.3 (air = 1) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
Mequinol storage and handling
Mequinol safe storage
Separated from strong oxidants, strong bases, acid anhydrides and acid chlorides.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Mequinol storage conditions
Conditions for safe storage, including any incompatibilities: Keep container tightly closed in a dry and well-ventilated place.
Source: Hazardous Substances Data Bank (HSDB)
Mequinol incompatible materials
Strong oxidizers, strong bases, acid chlorides, acid anhydrides.
Source: Hazardous Substances Data Bank (HSDB)
Mequinol reactivity
HYDROQUINONE MONOMETHYL ETHER can react with oxidizing materials. (NTP, 1992)
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Mequinol in the storage compatibility matrix →
10 · Questions
Mequinol — frequently asked questions
What is the CAS number of Mequinol?
The CAS number of Mequinol is 150-76-5. Its EC number is 205-769-8.
What is the chemical formula of Mequinol?
The molecular formula of Mequinol is C7H8O2 and its molecular weight is 124.14 g/mol.
What does a Mequinol label have to show?
Under CLP Annex VI the label for Mequinol carries the pictogram Exclamation mark and the signal word is Warning.
Is Mequinol flammable?
CLP Annex VI assigns Mequinol 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 132.22 °C (270 °F) (HSDB).
Is Mequinol a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Mequinol. 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 exposure limit for Mequinol?
The US occupational exposure limit reported for Mequinol is none See Appendix G (The National Institute for Occupational Safety and Health (NIOSH)). 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 Mequinol?
The boiling point reported for Mequinol is 253 °C (487.4 °F) (HSDB).
What is the melting point of Mequinol?
The melting point reported for Mequinol is 54 °C (129.2 °F) (HSDB).
How should Mequinol be stored?
Conditions for safe storage, including any incompatibilities: Keep container tightly closed in a dry and well-ventilated place. (Hazardous Substances Data Bank (HSDB))
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