Chromium(III) acetylacetonate

Synonym(s):Chromium(III) 2,4-pentanedionate;Chromium(III) acetylacetonate;Cr(acac)₃;Tris(acetylacetonato)chromium(III), Tris(2,4-pentanedionato)chromium(III)

CAS NO.：21679-31-2
Empirical Formula: C15H21CrO6
Molecular Weight: 349.32
MDL number: MFCD00000015
EINECS: 244-526-0
SAFETY DATA SHEET (SDS)
Update Date: 2024-10-31 18:15:48

Chromium(III) acetylacetonate Structural

What is Chromium(III) acetylacetonate?

Chemical properties

PURPLE CRYSTALLINE POWDER

The Uses of Chromium(III) acetylacetonate

Chromium(III) acetylacetonate may be used as an active site in the formation of redox systems for the fabrication of flow batteries. It may also be used as a precursor for chromium nitride based metallic coatings.

The Uses of Chromium(III) acetylacetonate

Catalyst in the oxidation of methacrylic esters by hydrogen peroxide, MOCVDChromium(III) 2,4-pentanedionate is used in the reduction of detonation of nitromethane. It is also used in NMR spectroscopy as a relaxation agent due to its solubility in nonpolar organic solvents and its paramagnetism. Further, it is involved in the modification of the surface properties of solid polyurethanes.

General Description

Chromium(III) acetylacetonate is an acidopentamminechromium (111) salt, which is a crystalline material that can be prepared by treatment of precipitated hydrous chromium(III) oxide with acetylacetone.

Flammability and Explosibility

Not classified

Safety Profile

Moderately toxic by ingestion. Mildly toxic by s h contact. When heated to decomposition it emits acrid smoke and irritating fumes. See also CHROMIUM COMPOUNDS.

Purification Methods

Purify it by dissolving 6g in hot *C6H6 (20mL) and adding 75mL of pet ether slowly. Cool to room temperature then chill on ice, filter off and dry in air to give 2.9g. It also crystallises from EtOH. It is soluble in heptane, *C6H6, toluene and pentane-2,4-dione at 20-40o. It forms a 1:2 complex with CHCl3. [Fernelius & Blanch Inorg Synth V 130 1957, Steinbach & Burns J Am Chem Soc 80 1839 1958, Beilstein 1 H 782, 1 II 836, 1 IV 3673.]

Properties of Chromium(III) acetylacetonate

Melting point:	210 °C(lit.)
Boiling point:	340 °C(lit.)
Density	1,35 g/cm³
vapor pressure	0Pa at 20℃
Flash point:	>200°C
storage temp.	Store below +30°C.
solubility	11g/l
form	Crystalline Powder, Crystals, and/or Chunks
color	Purple to maroon
Specific Gravity	1.35
PH	6 (1g/l, H2O, 20℃)
Water Solubility	11 g/L (20 ºC)
Hydrolytic Sensitivity	1: no significant reaction with aqueous systems
BRN	4148971
Exposure limits	NIOSH: IDLH 25 mg/m3; TWA 0.5 mg/m3
NIST Chemistry Reference	Chromium, tris(2,4-pentanedionato-o,o')-(21679-31-2)
EPA Substance Registry System	Chromium(III) acetylacetonate (21679-31-2)

Safety information for Chromium(III) acetylacetonate

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation
Precautionary Statement Codes	P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P332+P313:IF SKIN irritation occurs: Get medical advice/attention. P337+P313:IF eye irritation persists: Get medical advice/attention.