Substance profile
1,1-diethoxyethane
1,1-diethoxyethane is a colorless liquid with a pungent, green, woody solvent odor.
01 · Identification
What 1,1-diethoxyethane is
1,1-diethoxyethane is a colorless liquid with a pungent, green, woody solvent odor. Its molecular formula is C6H14O2 and its molecular weight is 118.17 g/mol. It boils at 103 °C, melts at -100 °C.
Under the GHS it carries the signal word Danger. It is classed as flammable agents - 3rd degree.
02 · Identifiers
1,1-diethoxyethane identifiers and molecular data
1,1-diethoxyethane CAS number and EC number
1,1-diethoxyethane molecular formula and molecular weight
Other names for 1,1-diethoxyethane
- acetal
03 · GHS classification
1,1-diethoxyethane hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
1,1-diethoxyethane pictograms and signal word
1,1-diethoxyethane hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Flammable liquids GHS chapter 2.6 | Category 2 | H225 | GHS02 |
| Skin corrosion/irritation GHS chapter 3.2 | Category 2 | H315 | GHS07 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 2A | H319 | GHS07 |
1,1-diethoxyethane hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H225 | Highly flammable liquid and vapour. |
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
This page lists only the codes assigned to 1,1-diethoxyethane. 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 1,1-diethoxyethane
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 1,1-diethoxyethane 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
1,1-diethoxyethane precautionary statements
CLP Annex VI assigns 14 precautionary statements to 1,1-diethoxyethane. 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
1,1-diethoxyethane 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 | 1,1-диетоксиетан ацетал |
| Spanish español | 1,1-Dietoxietano acetal |
| Czech čeština | 1,1-diethoxyethan acetal |
| Danish dansk | 1,1-diethoxyethan acetal |
| German Deutsch | 1,1-Diethoxyethan Acetal |
| Estonian eesti | 1,1-dietoksüetaan atsetaal |
| Greek ελληνικά | 1,1-διαιθοξυαιθάνιο ακετάλη |
| English English | 1,1-diethoxyethane acetal |
| French français | 1,1-diéthoxyéthane acétal |
| Croatian hrvatski | 1,1-dietoksietan acetal |
| Italian italiano | 1,1-dietossi-etano acetale |
| Latvian latviešu | 1,1-dietoksietāns acetāls |
| Lithuanian lietuvių | 1,1-dietoksietanas acetalis |
| Hungarian magyar | 1,1-dietoxietán acetál |
| Maltese Malti | 1,1-dietossietan aċetal |
| Dutch Nederlands | 1,1-diëthoxy-ethaan acetaal |
| Polish polski | 1,1-dietoksyetan acetal |
| Portuguese português | 1,1-dietoxietano acetal |
| Romanian română | 1,1-dietoxietan acetal |
| Slovak slovenčina | 1,1-dietoxyetán acetaldehyd-dietylacetál |
| Slovenian slovenščina | 1,1-dietoksietan acetal |
| Finnish suomi | 1,1-dietoksietaani asetaali |
| Swedish svenska | 1,1-dietoxietan acetal |
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
1,1-diethoxyethane GHS label elements
Everything CLP Annex VI fixes for 1,1-diethoxyethane, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
1,1-diethoxyethane
- Highly flammable liquid and vapour.
- Causes skin irritation.
- Causes serious eye irritation.
- Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- Keep container tightly closed.
- Use explosion-proof [electrical/ventilating/lighting/…] equipment.
- Use only non-sparking tools.
- Wash … thoroughly after handling.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF ON SKIN:
- IF IN EYES:
- Get medical advice/attention.
- If skin irritation occurs:
- If eye irritation persists:
- Remove contact lenses, if present and easy to do. Continue rinsing.
- Wash with plenty of water/…
- Store in a well-ventilated place.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open 1,1-diethoxyethane in the GHS label constructor →
07 · Health hazards
1,1-diethoxyethane health hazards and exposure limits
1,1-diethoxyethane hazard summary
Highly flammable; Inhalation of high concentrations can cause CNS depression; [Hawley] Hydrolyzed in the stomach to acetaldehyde and ethyl alcohol; [HSDB] Forms heat-sensitive explosive peroxides on contact with air; An upper respiratory tract irritant; [CAMEO] A mild skin and eye irritant, based on animal studies; [CHEMINFO] A skin, eye, and respiratory tract irritant; Exposure may result in lowering of consciousness. [ICSC] Safe when used as a flavoring agent in food; [JECFA] An irritant; [MSDSonline]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
1,1-diethoxyethane 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.
1,1-diethoxyethane boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 102.7 °C (216.9 °F) | at 760 mmHg | HSDB |
| 102.22 °C (216 °F) | at 760 mmHg | CAMEO | |
| 103 °C (217.4 °F) | ICSC |
1,1-diethoxyethane melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -100 °C (-148 °F) | HSDB |
1,1-diethoxyethane density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.83 g/cm³ | ICSC | |
| 0.8254 g/cm³ | at 20 °C | HSDB | |
| 0.831 g/cm³ | at 20 °C | CAMEO |
1,1-diethoxyethane solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | SOL IN CHLOROFORM | HSDB | |
| sol in acetone | HSDB |
1,1-diethoxyethane vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 56.87 mmHg | CAMEO | |
| 20.2517 mmHg | at 20 °C | ICSC | |
| 27.6 mmHg | at 25 °C, from experimentally derived coefficients | HSDB |
1,1-diethoxyethane flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | -20.56 °C (-5 °F) | HSDB | |
| -21 °C (-5.8 °F) | ICSC |
1,1-diethoxyethane autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 230 °C (446 °F) | HSDB |
1,1-diethoxyethane lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 1.6 % by volume | HSDB | |
| 1.65 % by volume | CAMEO |
1,1-diethoxyethane upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 10.4 % by volume | HSDB |
1,1-diethoxyethane vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 4.08 (air = 1) | HSDB | |
| 4.1 (air = 1) | ICSC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
1,1-diethoxyethane 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.
1,1-diethoxyethane fire potential
DANGEROUS, DUE TO FIRE AND EXPLOSION HAZARDS. DANGEROUS, WHEN EXPOSED TO HEAT OR FLAME
Source: Hazardous Substances Data Bank (HSDB)
Solubility
MISCIBLE WITH ALCOHOL, 60% ALCOHOL, ETHER; SOL IN HEPTANE, METHYLCYCLOHEXANE, ETHYL ACETATE; PROPYL, ISOPROPYL, BUTYL & ISOBUTYL ALCOHOLS; 100 G WATER DISSOLVE 5 G ACETAL
Source: HSDB
10 · Handling and storage
1,1-diethoxyethane storage and handling
1,1-diethoxyethane peroxide formation
B: Compounds that form peroxides on concentration (distillation/evaporation)
Source: Lab and Research Safety, University of Minnesota
1,1-diethoxyethane safe storage
Fireproof. Separated from strong oxidants. Cool. Keep in the dark. Well closed. Store only if stabilized.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
1,1-diethoxyethane incompatible materials
...CAN REACT VIGOROUSLY WITH OXIDIZING MATERIALS.
Source: Hazardous Substances Data Bank (HSDB)
1,1-diethoxyethane reactivity
ACETAL can react vigorously with oxidizing agents. Stable in base but readily decomposed by dilute acids. Forms heat-sensitive explosive peroxides on contact with air. Old samples have been known to explode when heated due to peroxide formation [Sax, 9th ed., 1996, p. 5].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 1,1-diethoxyethane in the storage compatibility matrix →
11 · Transport
1,1-diethoxyethane UN number and transport classification
Transport classification is a separate system from the GHS classification above. It decides how a package is marked and how a load may be carried; it does not follow from the workplace label, and the workplace label does not follow from it. The entries below are linked by CAS number, never by name.
1,1-diethoxyethane under UN 1088 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| ACETAL | 3 | F1 | II | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 3 is “Flammable liquids” (ADR 2.1.1.1).
United States · 49 CFR 172.101 Hazardous Materials Table
| Proper shipping name (column 2) | Class or division | PG | Labels (column 6) |
|---|---|---|---|
| Acetal | 3 | II | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 3 is “Flammable and combustible liquid” (49 CFR 173.2).
12 · Questions
1,1-diethoxyethane — frequently asked questions
What is the CAS number of 1,1-diethoxyethane?
The CAS number of 1,1-diethoxyethane is 105-57-7. Its EC number is 203-310-6.
What is the chemical formula of 1,1-diethoxyethane?
The molecular formula of 1,1-diethoxyethane is C6H14O2 and its molecular weight is 118.17 g/mol.
What does a 1,1-diethoxyethane label have to show?
Under CLP Annex VI the label for 1,1-diethoxyethane carries the pictograms Flame and Exclamation mark and the signal word is Danger.
Is 1,1-diethoxyethane flammable?
Yes. CLP Annex VI assigns 1,1-diethoxyethane H225 — highly flammable liquid and vapour. The flash point reported for it is -20.56 °C (-5 °F) (HSDB).
Is 1,1-diethoxyethane a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 1,1-diethoxyethane. 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 1,1-diethoxyethane?
The boiling point reported for 1,1-diethoxyethane is 102.7 °C (216.9 °F), at 760 mmHg (HSDB).
What is the melting point of 1,1-diethoxyethane?
The melting point reported for 1,1-diethoxyethane is -100 °C (-148 °F) (HSDB).
How should 1,1-diethoxyethane be stored?
CLP Annex VI assigns 1,1-diethoxyethane the storage statement P403.
Nearby
Substances next to 1,1-diethoxyethane
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