Substance profile
Trimethylhydroquinone
Trimethylhydroquinone is a chemical substance with the molecular formula C9H12O2.
01 · Identification
What Trimethylhydroquinone is
Trimethylhydroquinone is a chemical substance with the molecular formula C9H12O2. Its molecular formula is C9H12O2 and its molecular weight is 152.19 g/mol.
Under the GHS it carries the signal word Danger.
02 · Identifiers
Trimethylhydroquinone identifiers and molecular data
Trimethylhydroquinone CAS number and EC number
Trimethylhydroquinone molecular formula and molecular weight
Other names for Trimethylhydroquinone
- 2,3,5-trimethylhydroquinone
03 · GHS classification
Trimethylhydroquinone hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Trimethylhydroquinone pictograms and signal word
Trimethylhydroquinone hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - inhalation GHS chapter 3.1 | Category 4 | H332 | GHS07 |
| 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 |
| Specific target organ toxicity - single exposure GHS chapter 3.8 | Category 3 | H335 | GHS07 |
| 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.
Trimethylhydroquinone hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H332 | Harmful if inhaled. |
| H335 | May cause respiratory irritation. |
| 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. |
This page lists only the codes assigned to Trimethylhydroquinone. 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 Trimethylhydroquinone
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 Trimethylhydroquinone 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
Trimethylhydroquinone precautionary statements
CLP Annex VI assigns 19 precautionary statements to Trimethylhydroquinone. 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
Trimethylhydroquinone 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 | 2,3,5-триметилхидрохинон |
| Spanish español | 2,3,5-Trimetilhidroquinona |
| Czech čeština | 2,3,5-trimethylhydrochinon |
| Danish dansk | 2,3,5-trimethylhydroquinon |
| German Deutsch | 2,3,5-Trimethylhydrochinon |
| Estonian eesti | 2,3,5-trimetüülhüdrokinoon |
| Greek ελληνικά | 2,3,5-τριμεθυλυδροκινόνη |
| English English | 2,3,5-trimethylhydroquinone |
| French français | 2,3,5-triméthylhydroquinone |
| Croatian hrvatski | 2,3,5-trimetilhidrokinon |
| Italian italiano | 2,3,5-timetilidrochinone |
| Latvian latviešu | 2,3,5-trimetilhidrohinons |
| Lithuanian lietuvių | 2,3,5-trimetilhidrochinonas |
| Hungarian magyar | 2,3,5-trimetilhidrokinon |
| Maltese Malti | 2,3,5-trimetilidrokinon |
| Dutch Nederlands | 2,3,5-trimethylhydrochinon |
| Polish polski | 2,3,5-trimetylohydrochinon |
| Portuguese português | 2,3,5-trimetil-hidroquinona |
| Romanian română | 2,3,5-trimetilhidrochinonă |
| Slovak slovenčina | 2,3,5-trimetylbenzén-1,4-diol |
| Slovenian slovenščina | 2,3,5-trimetilhidrokinon |
| Finnish suomi | 2,3,5-trimetyylihydrokinoni |
| Swedish svenska | 2,3,5-trimetylhydrokinon |
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
Trimethylhydroquinone GHS label elements
Everything CLP Annex VI fixes for Trimethylhydroquinone, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Trimethylhydroquinone
- Harmful if inhaled.
- May cause respiratory irritation.
- 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.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Wash … thoroughly after handling.
- 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 ON SKIN:
- IF INHALED:
- IF IN EYES:
- Immediately call a POISON CENTER/doctor/…
- Call a POISON CENTER/doctor/… if you feel unwell.
- Get medical advice/attention.
- 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 Trimethylhydroquinone in the GHS label constructor →
07 · Health hazards
Trimethylhydroquinone health hazards and exposure limits
Trimethylhydroquinone hazard summary
Causes burns or irritation to rabbit skin; A severe eye irritant in rabbits; A skin sensitizer in guinea pig skin painting test; [IUCLID] Danger of skin sensitization; [MAK] Causes corneal damage, other cardiac changes, and emphysema in inhalation lethal-concentration studies of rats; [RTECS] An irritant that may cause serious eye injury; May cause skin sensitization; Harmful by inhalation; [Sigma-Aldrich MSDS] See Hydroquinone.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Trimethylhydroquinone 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.
Trimethylhydroquinone vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.000204 mmHg | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Questions
Trimethylhydroquinone — frequently asked questions
What is the CAS number of Trimethylhydroquinone?
The CAS number of Trimethylhydroquinone is 700-13-0. Its EC number is 211-838-3.
What is the chemical formula of Trimethylhydroquinone?
The molecular formula of Trimethylhydroquinone is C9H12O2 and its molecular weight is 152.19 g/mol.
What does a Trimethylhydroquinone label have to show?
Under CLP Annex VI the label for Trimethylhydroquinone carries the pictograms Corrosion, Exclamation mark and Environment and the signal word is Danger.
Is Trimethylhydroquinone flammable?
CLP Annex VI assigns Trimethylhydroquinone 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 Trimethylhydroquinone a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Trimethylhydroquinone. 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.
Nearby
Substances next to Trimethylhydroquinone
Keep going: substances starting with T, or search the whole database by name, CAS number, pictogram or signal word.