77-78-1
Product Name:
Dimethyl sulfate
Formula:
C2H6O4S
Synonyms:
Sulfuric acid dimethyl ester
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Dimethyl sulfate is a colorless oily liquid, odorless to a faint onion-like odor. It is very toxic by inhalation. It is a combustible liquid and has a flash point of 182 °F. It is slightly soluble in water and decomposed by water to give sulfuric acid with evolution of heat. It is corrosive to metals and tissue. It is a potent methylating agent. |
|---|---|
| Color/Form | Colorless oily liquid |
| Odor | Essentially odorless |
| Boiling Point | About 370 °F (with decomposition) (EPA, 1998) |
| Melting Point | -25.15 °F (EPA, 1998) |
| Flash Point | 182 °F (EPA, 1998) |
| Solubility | 3 % at 64 °F (NIOSH, 2023) |
| Density | 1.3283 at 68 °F (EPA, 1998) - Denser than water; will sink |
| Vapor Density | 4.35 (EPA, 1998) - Heavier than air; will sink (Relative to Air) |
| Vapor Pressure | 0.1 to 0.5 mmHg at 68 °F (EPA, 1998) |
| LogP | 0.16 |
| Stability/Shelf Life | Stable at room temperature. |
| Autoignition Temperature | 370 °F (USCG, 1999) |
| Decomposition | Note: Decomposes in water to sulfuric acid; corrosive to metals. |
| Corrosivity | Corrosive |
| Heat of Combustion | 11,970 J/g at constant pressure (25 °C, CO@, H2), H2SO4 (aqueous) |
| Heat of Vaporization | 385 J/g at 25 °C |
| Surface Tension | 40.12 DYNES/CM AT 18 °C in contact with air |
| Refractive Index | Index of refraction: 1.3874 at 20 °C/D |
| Kovats Retention Index | 853 |
| Other Experimental Properties | Heat of formation: 736 kJ/mol at 25 °C (liquid) |
| Chemical Classes | Toxic Gases & Vapors -> Other Toxic Gases & Vapors |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Corrosion Corrosives GHS05  Skull and Crossbones Acute Toxicity GHS06  Health Hazard GHS08 |
| GHS Hazard Statements |
H301:Acute toxicity,oral H314:Skin corrosion/irritation H317:Sensitisation, Skin H330:Acute toxicity,inhalation H341:Germ cell mutagenicity H350:Carcinogenicity |
| Precautionary Statement Codes |
P202:Do not handle until all safety precautions have been read and understood. P260:Do not breathe dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
COMPUTED DESCRIPTORS
| Molecular Weight | 126.13 g/mol |
|---|---|
| XLogP3 | -0.3 |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 2 |
| Exact Mass | 125.99867984 g/mol |
| Monoisotopic Mass | 125.99867984 g/mol |
| Topological Polar Surface Area | 61 Ų |
| Heavy Atom Count | 7 |
| Formal Charge | 0 |
| Complexity | 107 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Dimethyl sulfate is a colorless oily liquid, odorless to a faint onion-like odor. It is very toxic by inhalation. It is a combustible liquid and has a flash point of 182 °F. It is slightly soluble in water and decomposed by water to give sulfuric acid with evolution of heat. It is corrosive to metals and tissue. It is a potent methylating agent.
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