Trimethylacetic Acid

Chemical Properties

Melting point	32-35 °C(lit.)
Boiling point	163-164 °C(lit.)
Density	0.889 g/mL at 25 °C(lit.)
vapor density	3.6 (vs air)
vapor pressure	9.75 mm Hg ( 60 °C)
refractive index	1.393
Flash point	147 °F
storage temp.	Store below +30°C.
solubility	soluble in EtOH, ether, H2O
pka	5.03(at 25℃)
form	Powder, Crystals and/or Chunks
Specific Gravity	1.121
color	Yellow to orange to tan
PH	4.04(1 mM solution);3.52(10 mM solution);3.02(100 mM solution)
explosive limit	1.6%(V)
Water Solubility	25 g/L (20 ºC)
FreezingPoint	32.0 to 36.0 ℃
Merck	14,7511
BRN	969480
Henry's Law Constant	3.5×10⁰ mol/(m³Pa) at 25℃, Khan et al. (1995)
InChI	1S/C5H10O2/c1-5(2,3)4(6)7/h1-3H3,(H,6,7)
InChIKey	IUGYQRQAERSCNH-UHFFFAOYSA-N
SMILES	OC(C(C)(C)C)=O
LogP	1.480
CAS DataBase Reference	75-98-9(CAS DataBase Reference)
NIST Chemistry Reference	Pivalic acid(75-98-9)
EPA Substance Registry System	Pivalic acid (75-98-9)

Hazard Codes	C
Risk Statements	21/22-34
Safety Statements	26-36/37/39-45
RIDADR	UN 3261 8/PG 2
WGK Germany	1
RTECS	TO7700000
TSCA	TSCA listed
HazardClass	8
PackingGroup	II
HS Code	29159000
Storage Class	11 - Combustible Solids
Hazard Classifications	Acute Tox. 4 Oral Eye Irrit. 2 Skin Irrit. 2
Hazardous Substances Data	75-98-9(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 900 mg/kg LD50 dermal Rat 1900 mg/kg