Substance profile
3-acetyl-6-methyl-2H-pyran-2,4(3H)-dione
3-acetyl-6-methyl-2H-pyran-2,4(3H)-dione is needles from water, rhombic needles or prisms from alcohol and is odorless.
01 · Identification
What 3-acetyl-6-methyl-2H-pyran-2,4… is
3-acetyl-6-methyl-2H-pyran-2,4(3H)-dione is needles from water, rhombic needles or prisms from alcohol and is odorless. Its molecular formula is C8H8O4 and its molecular weight is 168.15 g/mol. It boils at 270 °C, melts at 110 °C.
Under the GHS it carries the signal word Warning.
02 · Identifiers
3-acetyl-6-methyl-2H-pyran-2,4… identifiers and molecular data
3-acetyl-6-methyl-2H-pyran-2,4… CAS number and EC number
3-acetyl-6-methyl-2H-pyran-2,4… molecular formula and molecular weight
Other names for 3-acetyl-6-methyl-2H-pyran-2,4…
- dehydracetic acid
03 · GHS classification
3-acetyl-6-methyl-2H-pyran-2,4… hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
3-acetyl-6-methyl-2H-pyran-2,4… pictograms and signal word
3-acetyl-6-methyl-2H-pyran-2,4… hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
3-acetyl-6-methyl-2H-pyran-2,4… hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H302 | Harmful if swallowed. |
This page lists only the codes assigned to 3-acetyl-6-methyl-2H-pyran…. 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 3-acetyl-6-methyl-2H-pyran…
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 3-acetyl-6-methyl-2H-p… 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
3-acetyl-6-methyl-2H-pyran-2,4… precautionary statements
CLP Annex VI assigns 4 precautionary statements to 3-acetyl-6-methyl-2H-pyran…. 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
3-acetyl-6-methyl-2H-pyran-2,4… 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 | 3-ацетил-6-метил-2 H -пиран-2,4(3 H )-дион дехидроцетна киселина |
| Spanish español | 3-Acetil-6-metil-2 H -pirano-2,4(3 H )-diona ácido dehidroacético |
| Czech čeština | 3-acetyl-6-methyltetrahydropyran-2,4-dion dehydracetová kyselina |
| Danish dansk | 3-acetyl-6-methyl-2 H- pyran-2,4(3 H) -dion dehydracetsyre |
| German Deutsch | 3-Acetyl-6-methyl-2 H -pyran-2,4(3 H )-dion Dehydracetsäure |
| Estonian eesti | 3-atsetüül-6-metüül-2 H -püraan-2,4(3 H )-dioon dehüdroäädikhape |
| Greek ελληνικά | 3-ακετυλο-6-μεθυλο-2 H -πυρανο-2,4(3 H )-διόνη δεϋδροξικό οξύ |
| English English | 3-acetyl-6-methyl-2 H -pyran-2,4(3 H )-dione dehydracetic acid |
| French français | 3-acétyl-6-méthyl-2 H -pyran-2,4(3 H )-dione acide déhydroacétique |
| Croatian hrvatski | 3-acetil-6-metil-2 H -piran-2,4(3 H )-dion dehidrooctena kiselina |
| Italian italiano | 3-acetil-6-metil-2 H -piran-2,4(3 H )-dione acido deidroacetico |
| Latvian latviešu | 3-acetil-6-metil-2 H -pirān-2,4(3 H )-dions dehidroetiķskābe |
| Lithuanian lietuvių | 3-acetil-6-metil-2 H -piran-2,4(3 H )-dionas dehidracto rūgštis |
| Hungarian magyar | 3-acetil-6-metil-2 H -pirán-2,4(3 H )-dion dehidrecetsav |
| Maltese Malti | 3-aċetil-6-metil-2 H -piran-2,4(3 H )-dion aċidu deidraċetiku |
| Dutch Nederlands | 3-acetyl-6-methyl-2 H -pyran-2,4(3 H )-dion dehydroazijnzuur |
| Polish polski | 3-acetylo-6-metylo-2 H -pirano-2,4(3 H )-dion kwas dehydrooctowy |
| Portuguese português | 3-acetil-6-metil-2 H -pirano-2,4(3 H )-diona ácido desidroacético |
| Romanian română | 3-acetil-6-metil-2 H -piran-2,4(3 H )-dionă acid dehidracetic |
| Slovak slovenčina | 3-acetyl-6-metyl-2 H -pyrán-2,4(3 H )-dión kyselina dehydracetová |
| Slovenian slovenščina | 3-acetil-6-metil-2 H -piran-2,4(3 H )-dion dehidrocetna kislina |
| Finnish suomi | 3-asetyyli-6-metyyli-2 H -pyraani-2,4(3 H )-dioni dehydroetikkahappo |
| Swedish svenska | 3-acetyl-6-metyl-2 H -pyran-2,4(3 H )-dion dehydroättiksyra |
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
3-acetyl-6-methyl-2H-pyran-2,4… GHS label elements
Everything CLP Annex VI fixes for 3-acetyl-6-methyl-2H-pyran…, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
3-acetyl-6-methyl-2H-pyran-2,4…
- Harmful if swallowed.
- Do not eat, drink or smoke when using this product.
- IF SWALLOWED:
- 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 3-acetyl-6-methyl-2H-pyran… in the GHS label constructor →
07 · Physical and chemical properties
3-acetyl-6-methyl-2H-pyran-2,4… 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.
3-acetyl-6-methyl-2H-pyran-2,4… boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 269.9 °C (517.8 °F) | at 760 mmHg | HSDB |
3-acetyl-6-methyl-2H-pyran-2,4… melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 110 °C (230 °F) | range, midpoint shown | HSDB |
3-acetyl-6-methyl-2H-pyran-2,4… solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | SOL IN ALKALIES | HSDB | |
| water solubility = 690 mg/l @ 25 °C | at 25 °C | HSDB |
3-acetyl-6-methyl-2H-pyran-2,4… vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 1.9 mmHg | at 100 °C | HSDB |
3-acetyl-6-methyl-2H-pyran-2,4… flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 157 °C (314.6 °F) | HSDB |
3-acetyl-6-methyl-2H-pyran-2,4… autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 366 °C (690.8 °F) | HSDB |
3-acetyl-6-methyl-2H-pyran-2,4… vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 5.8 (air = 1) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
08 · Fire and explosion
3-acetyl-6-methyl-2H-pyran… 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.
3-acetyl-6-methyl-2H-pyran-2,4… fire potential
SLIGHT
Source: Hazardous Substances Data Bank (HSDB)
Solubility
(WT/WT) 22% IN ACETONE, 18% IN BENZENE, 5% IN METHANOL, 3% IN USP ETHANOL, 3% IN CARBON TETRACHLORIDE, 5% IN ETHER, 0.7% IN N-HEPTANE, LESS THAN 0.1% IN GLYCEROL, 1.6% IN OLIVE OIL, 1.7% IN PROPYLENE GLYCOL, LESS THAN 0.1% IN WATER AT 25 °C
Source: HSDB
09 · Handling and storage
3-acetyl-6-methyl-2H-pyran-2,4… storage and handling
3-acetyl-6-methyl-2H-pyran-2,4… incompatible materials
HIGHLY REACTIVE
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check 3-acetyl-6-methyl-2H-pyra… in the storage compatibility matrix →
10 · Questions
3-acetyl-6-methyl-2H-pyran-2,4… — frequently asked questions
What is the CAS number of 3-acetyl-6-methyl-2H-pyran-2,4…?
The CAS number of 3-acetyl-6-methyl-2H-pyran-2,4… is 520-45-6. Its EC number is 208-293-9.
What is the chemical formula of 3-acetyl-6-methyl-2H-pyran-2,4…?
The molecular formula of 3-acetyl-6-methyl-2H-pyran-2,4… is C8H8O4 and its molecular weight is 168.15 g/mol.
What does a 3-acetyl-6-methyl-2H-pyran-2,4… label have to show?
Under CLP Annex VI the label for 3-acetyl-6-methyl-2H-pyran-2,4… carries the pictogram Exclamation mark and the signal word is Warning.
Is 3-acetyl-6-methyl-2H-pyran-2,4… flammable?
CLP Annex VI assigns 3-acetyl-6-methyl-2H-pyran-2,4… 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 157 °C (314.6 °F) (HSDB).
Is 3-acetyl-6-methyl-2H-pyran-2,4… a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 3-acetyl-6-methyl-2H-pyran-2,4…. 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 3-acetyl-6-methyl-2H-pyran-2,4…?
The boiling point reported for 3-acetyl-6-methyl-2H-pyran-2,4… is 269.9 °C (517.8 °F), at 760 mmHg (HSDB).
What is the melting point of 3-acetyl-6-methyl-2H-pyran-2,4…?
The melting point reported for 3-acetyl-6-methyl-2H-pyran-2,4… is 110 °C (230 °F), range, midpoint shown (HSDB).
Nearby
Substances next to 3-acetyl-6-methyl-2H-pyran…
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