ARSENIC TRIOXIDE

UN Number: 1561

Also known as: ARSENOUS SESQUIOXIDE, ARSENOUS ACID, ARSENOUS ACID ANHYDRIDE, ARSENOUS OXIDE, ARSODENT, CLAUDERITE, DIARSENIC TRIOXIDE

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List

Description

UN number

1561

Physical chemical data

Physical State (20°C)

Solid

Density (kg/m3)

3700 [Kg/m³] at a temperature of 20°C

Molar mass (g/mol)

197.8

Boiling Point (°C)

457

Melting Point (°C)

315

Behaviour at sea

Additional data

Colour	white
Odour	odourless

Transportation data

Package group	II
State	solid
Temperature (°C)	ambient
Pressure (Pa)	under pressure
IMO class	6.1

Reactivity data

Water

GESAMP Hazard profile

Human toxicity threshold

IDHL	0.56
TLV-TWA	0.0012(As)
TEEL-1 (mg/m3)	0.4
TEEL-3 (mg/m3)	9.1

Ecotoxicity

Incident reports

Year	Vessel	Location	Cargo type
1992	Santa Clara	Port Elisabeth, USA	Package

Emergency Response Guidebook

Guide number: 151

See the guide or download the emergency response guidebook

At sea emergency guide

Emergency schedule: 6.1-04

TOXIC SOLIDS, NOT COVERED BY OTHER SCHEDULES.

Emergency procedures

Spillage on deck

Collect spillage, where practicable, for safe disposal. Wash remainder overboard with copious quantities of water.

Spillage under deck

Collect spillage, where practicable, for safe disposal.

Fire on deck

Use copious quantities of water or other medium to fight fire and cool down receptacles.

Fire under deck

Batten down; use ship's fixed fire-fighting installation. Otherwise adopt action as for "On deck".

Special equipment to be carried

Full protective clothing (gloves, boots, coveralls, headgear, goggles).
Self-contained breathing apparatus.

Remarks by UN no.

BERYLLIUM COMPOUND, N.O.S. (UN No. 1566)
Wear self-contained breathing apparatus when dealing with spillage.

DINITRO-ortho-CRESOL (UN No. 1598)
MERCURY OXYCYANIDE, DESENSITIZED (UN No. 1642)
In fire, explosion hazard.

ASBESTOS, BLUE (UN No. 2212)
ASBESTOS, WHITE (UN No. 2590)
Wear self-contained breathing apparatus when dealing with spillage.

THALLIUM NITRATE (UN No. 2727)
In fire situation, use copious quantities of water. Ship's fixed fire-fighting installation may not be effective.

CASTOR BEANS (UN No. 2969)
ALUMINIUM PHOSPHIDE PESTICIDE (UN No. 3048)
Wear self-contained breathing apparatus when dealing with spillage.

Decision trees

No decision trees available

No additional data