Dinitrogen tetraoxide
[CAS# 10544-72-6]

Identification

• Classification: Inorganic chemical industry >> Industrial gases such as hydrogen, nitrogen and oxygen
• Name: Dinitrogen tetraoxide
• Synonyms: Dinitrogen tetroxide; Nitrogen tetraoxide; Nitrogen tetroxide
• Molecular Formula: N₂O₄
• Molecular Weight: 92.01
• CAS Registry Number: 10544-72-6
• EC Number: 234-126-4

Properties

• Solubility: Freely soluble (348 g/L) (25 ºC), Calc.^*
• Density: 1.4906 g/cm³ (0 ºC)^**
• Melting point: -9.3 ºC^***
• Boiling point: 21.15 ºC^****
• Refractive index: 1.420 (589.3 nm 20 ºC)^*****

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2017 ACD/Labs)

^** Mittasch, A.; Zeitschrift fuer Anorganische und Allgemeine Chemie 1926, V159, P1-36.

^*** "Hazardous Substances Data Bank" data were obtained from the National Library of Medicine (US)

^**** Addison, C. C.; Journal of the Chemical Society 1960, P1783-8.

^***** Addison, C. C.; Journal of the Chemical Society 1951, P1294-7.

Safety Data

• Hazard Symbols: GHS04;GHS03;GHS06;GHS05 Danger
• Hazard Statements: H270-H330-H314
• Safety Description: S9;S26;S28;S36/37/39;S45

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Skin corrosion	Skin Corr.	1B	H314
Oxidising gases	Ox. Gas	1	H270
Acute toxicity	Acute Tox.	1	H330
Gases under pressure (liquid)	Press. Gas (Liq.)		H280
Acute toxicity	Acute Tox.	2	H330
Gases under pressure (compressed)	Press. Gas (Comp.)		H280
Serious eye damage	Eye Dam.	1	H318
Specific target organ toxicity - single exposure	STOT SE	3	H335
Specific target organ toxicity - single exposure	STOT SE	3	H336
Germ cell mutagenicity	Muta.	1B	H340

• Transport Information: UN 1067 - class 2 - Nitrogen dioxide
• Hazardous Chemical?: Yes