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Chemical Datasheet
DIETHYL SULFATE |
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Chemical Identifiers
CAS Number |
UN/NA Number |
DOT Hazard Label |
USCG CHRIS Code |
- 64-67-5
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NIOSH Pocket Guide |
International Chem Safety Card |
none
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NFPA 704
General Description
A clear colorless liquid with a peppermint odor. Burns, though may be difficult to ignite. Corrosive to metals and tissue. It is a potent alkylating agent. Flash point is 104°C (219°F) [Aldrich MSDS].
Hazards
Reactivity Alerts
Air & Water Reactions
Combustible. Slowly reacts with water to form ethyl alcohol, a flammable liquid, and ethyl sulfate, with eventual conversion to sulfuric acid.
Fire Hazard
Special Hazards of Combustion Products: Highly toxic fumes contaning sulfur oxides may be generated along with thermal decomposition products such as ethyl ether and ethylene. Sulfuric acid may be produced in the presence of moisture.
Behavior in Fire: It burns to yield highly, toxic sulfur oxides. Above 100°C, it undergoes thermal decomposition to yield ethyl ether, ethylene and sulfur oxides which may cause an explosion in closed containers or confined spaces. (USCG, 1999)
Health Hazard
May be fatal if inhaled, swallowed or absorbed through skin. Inhalation causes nausea and vomiting. Causes burns to skin and eyes. Ingestion may cause nausea, vomiting abdominal pain and collapse. (USCG, 1999)
Reactivity Profile
The presence of moisture in a metal container of DIETHYL SULFATE caused the formation of sulfuric acid which reacts with the metal to release hydrogen which pressurized and exploded the container [Chem. Abst. 28:2908(1934)].
Belongs to the Following Reactive Group(s)
- Esters, Sulfate Esters, Phosphate Esters, Thiophosphate Esters, and Borate Esters
Potentially Incompatible Absorbents
No information available.
Response Recommendations
Isolation and Evacuation
Excerpt from 152
[Substances - Toxic (Combustible)]:
IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.
SPILL: Increase the immediate precautionary measure distance, in the downwind direction, as necessary.
FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2020)
Firefighting
Excerpt from 152
[Substances - Toxic (Combustible)]:
SMALL FIRE: Dry chemical, CO2 or water spray.
LARGE FIRE: Water spray, fog or regular foam. If it can be done safely, move undamaged containers away from the area around the fire. Dike runoff from fire control for later disposal. Avoid aiming straight or solid streams directly onto the product.
FIRE INVOLVING TANKS OR CAR/TRAILER LOADS: Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles. Do not get water inside containers. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned master stream devices or monitor nozzles; if this is impossible, withdraw from area and let fire burn. (ERG, 2020)
Non-Fire Response
Excerpt from 152
[Substances - Toxic (Combustible)]:
ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. Cover with plastic sheet to prevent spreading. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS. (ERG, 2020)
Protective Clothing
Wear positive pressure breathing apparatus and special protective clothing. (USCG, 1999)
DuPont Tychem® Suit Fabrics
Normalized Breakthrough Times (in Minutes)
Chemical |
CAS Number |
State |
QS |
QC |
SL |
C3 |
TF |
TP |
RC |
TK |
RF |
Diethyl sulfate |
64-67-5 |
Liquid |
|
|
|
>480 |
>480 |
>480 |
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>480 |
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Sulfuric acid diethyl ester |
64-67-5 |
Liquid |
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|
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>480 |
>480 |
>480 |
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>480 |
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Special Warning from DuPont: Tychem® and Tyvek® fabrics should not be
used around heat, flames, sparks or in potentially flammable or
explosive environments. Only...
(DuPont, 2023)
First Aid
INHHALATION: Remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
EYES OR SKIN: Irrigate with running water for at least 15 min.; hold eyelids open if neccessary. Consult an ophthamologist immediately. Wash skin with soap and water. Speed in removing material from skin is of extreme importance. Remove contaminated clothing and shoes at the site. Keep victim quiet and maintain normal body temperature. Effects may be delayed; keep victim under observation.
INGESTION: If victim is conscious, give victim two glasses of water and have victim induce vomiting. (USCG, 1999)
Physical Properties
Flash Point:
220°F
(USCG, 1999)
Lower Explosive Limit (LEL):
4.1 %
(USCG, 1999)
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature:
817°F
(USCG, 1999)
Melting Point:
-12°F
(USCG, 1999)
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity:
1.1803
at 68°F
(USCG, 1999)
- Denser than water; will sink
Boiling Point:
409°F
at 760 mmHg
(USCG, 1999)
Molecular Weight:
154.18
(USCG, 1999)
Water Solubility: data unavailable
Ionization Energy/Potential: data unavailable
IDLH: data unavailable
AEGLs (Acute Exposure Guideline Levels)
No AEGL information available.
ERPGs (Emergency Response Planning Guidelines)
No ERPG information available.
PACs (Protective Action Criteria)
Chemical |
PAC-1 |
PAC-2 |
PAC-3 |
Diethyl sulfate (64-67-5)
|
0.16 ppm |
1.8 ppm |
11 ppm |
(DOE, 2018)
Regulatory Information
EPA Consolidated List of Lists
Regulatory Name |
CAS Number/ 313 Category Code |
EPCRA 302 EHS TPQ |
EPCRA 304 EHS RQ |
CERCLA RQ |
EPCRA 313 TRI |
RCRA Code |
CAA 112(r) RMP TQ |
Diethyl sulfate |
64-67-5 |
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10 pounds |
313 |
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(EPA List of Lists, 2022)
CISA Chemical Facility Anti-Terrorism Standards (CFATS)
No regulatory information available.
OSHA Process Safety Management (PSM) Standard List
No regulatory information available.
Alternate Chemical Names
- DES
- DIETHYL SULFATE
- DIETHYL SULPHATE
- ETHYL SULFATE
- SULFURIC ACID, DIETHYL ESTER