Chemical Datasheet

URANYL ACETATE

Chemical Identifiers

CAS Number	UN/NA Number	DOT Hazard Label	USCG CHRIS Code
541-09-3	2910	Radioactive	URA
NIOSH Pocket Guide		International Chem Safety Card
Uranium (soluble compounds, as U)		none

NFPA 704

data unavailable

General Description

Yellow crystals with a slight odor of vinegar. Density 2.89 g / cm3.

Hazards

Reactivity Alerts

Radioactive Material

Air & Water Reactions

Water soluble, reacting to give a milky solution. The reaction is not hazardous.

Fire Hazard

Excerpt from 161

[Radioactive Materials (Low Level Radiation)]:

Some of these materials may burn, but most do not ignite readily. Many have cardboard outer packaging; content (physically large or small) can be of many different physical forms. Radioactivity does not change flammability or other properties of materials. (ERG, 2020)

Health Hazard

Inhalation of dust may irritate nose and throat. Contact with eyes causes irritation. (USCG, 1999)

Reactivity Profile

URANYL ACETATE reacts weakly as an acid. Usually does not react as either oxidizing agents or reducing agents but such behavior is not impossible. May catalyze organic reactions.

Belongs to the Following Reactive Group(s)

Salts, Acidic

Potentially Incompatible Absorbents

No information available.

Response Recommendations

Isolation and Evacuation

Excerpt from 161

[Radioactive Materials (Low Level Radiation)]:

IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area for at least 25 meters (75 feet) in all directions.

LARGE SPILL: Consider initial downwind evacuation for at least 100 meters (330 feet).

FIRE: When a large quantity of this material is involved in a major fire, consider an initial evacuation distance of 300 meters (1000 feet) in all directions. (ERG, 2020)

Firefighting

Excerpt from 161

[Radioactive Materials (Low Level Radiation)]:

Presence of radioactive material will not influence the fire control processes and should not influence selection of techniques. If it can be done safely, move undamaged containers away from the area around the fire. Do not move damaged packages; move undamaged packages out of fire zone.

SMALL FIRE: Dry chemical, CO2, water spray or regular foam.

LARGE FIRE: Water spray, fog (flooding amounts). (ERG, 2020)

Non-Fire Response

Excerpt from 161

[Radioactive Materials (Low Level Radiation)]:

Do not touch damaged packages or spilled material. Cover liquid spill with sand, earth or other non-combustible absorbent material. Cover powder spill with plastic sheet or tarp to minimize spreading. (ERG, 2020)

Protective Clothing

Approved dust respirator; goggles or face shield; protective clothing (USCG, 1999)

DuPont Tychem® Suit Fabrics

No information available.

First Aid

Get medical attention after all exposures to this compound.

INHALATION: move to fresh air.

INGESTION: give large amount of water; induce vomiting.

EYES: flush with water for at least 15 min.

SKIN: flush with water. (USCG, 1999)

Physical Properties

Chemical Formula:

UO2(C2H3O2)2.2H2O

Flash Point: data unavailable

Lower Explosive Limit (LEL): data unavailable

Upper Explosive Limit (UEL): data unavailable

Autoignition Temperature: data unavailable

Melting Point: data unavailable

Vapor Pressure: data unavailable

Vapor Density (Relative to Air): data unavailable

Specific Gravity: 2.89 at 68°F (USCG, 1999) - Denser than water; will sink

Boiling Point: data unavailable

Molecular Weight: 424.2 (USCG, 1999)

Water Solubility: data unavailable

Ionization Energy/Potential: data unavailable

IDLH: 10 mg U/m3 ; A potential occupational carcinogen. (NIOSH, 2023)

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
Uranyl acetate; (Uranium oxyacetate) (541-09-3)	0.98 mg/m3	5.5 mg/m3	33 mg/m3

(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
Uranyl acetate	541-09-3			100 pounds

(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

BIS (ACETATE) DIOXOURANIUM
BIS(ACETATO)DIOXOURANIUM
DIACETATODIOXOURANIUM
URANIUM ACETATE
URANIUM ACETATE DIHYDRATE
URANIUM DIACETATE DIOXIDE
URANIUM OXYACETATE
URANIUM OXYACETATE DIHYDRATE
URANIUM, BIS(ACETATO)DIOXO-
URANIUM, BIS(ACETATO-O)DIOXO-, (T-4)-
URANYL ACETATE
URANYL ACETATE (UO2(OAC)2)
URANYL ACETATE DIHYDRATE
URANYL DIACETATE
URANYL(2+) ACETATE