Di-N-pentyl phthalate

Description

Di-N-pentyl phthalate · CAS 131-18-0 · C18H26O4. UNII 5DC92K224X. Boiling Point: 648 °F at 760 mmHg (NTP, 1992); Boiling Point: 342 °C; Melting Point: FP: less than -55 °C.

Identification

CAS Registry Number	131-18-0
PubChem CID	8561
Molecular formula	C18H26O4
IUPAC name	dipentyl benzene-1,2-dicarboxylate
UNII (FDA)	5DC92K224X

Computed Descriptors

Molecular Weight	306.4
XLogP3	5.8
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	12
Exact Mass	306.18310931
Monoisotopic Mass	306.18310931
Topological Polar Surface Area	52.6
Heavy Atom Count	22
Formal Charge	0

Physical & Chemical Properties

Boiling Point	648 °F at 760 mmHg (NTP, 1992)
Boiling Point	342 °C
Melting Point	FP: less than -55 °C
Flash Point	357 °F (NTP, 1992)
Flash Point	357 °F; 180 °C (Closed cup)
Flash Point	245 dec F (118 °C) (Closed cup)
Solubility	In water, 0.8 mg/L at 25 °C
Density	1.022 at 20 °C
Vapor Density	10.5 (AIR= 1)
Vapor Pressure	0.000196 [mmHg]

Physical description & handling notes

• Di-n-pentyl phthalate is a clear colorless to light yellow liquid. Practically odorless. Floats on water. (NTP, 1992)
• Colorless oily liquid; [Hawley] Clear colorless to light yellow liquid; [CAMEO] Clear very faintly yellow liquid; [MSDSonline]
• Colorless, oily liquid
• Nearly odorless
• less than -67 °F (NTP, 1992)
• less than 1 mg/mL at 68 °F (NTP, 1992)

GHS Hazard Classification

Reported hazard statements	H400, H360 (99.3%)

Documented Uses

• By esterification of the phthalic anhydride with amyl alcohol in the presence of approximately 1% concentrated sulfuric acid as catalyst.
• Production volumes for non-confidential chemicals reported under the Inventory Update Rule. [Table#997]
• 1,2-Benzenedicarboxylic acid, 1,2-dipentyl ester: ACTIVE
• Diamyl phthalate was metabolized in vivo to its corresponding monoester by nonspecific esterases in the intestinal mucosa and other tissues.
• Phthalate esters are first hydrolyzed to their monoester derivative. Once formed, the monoester derivative can be further hydrolyzed in vivo to phthalic acid or conjugated to glucuronide, both of which can then be excreted. The terminal or next-to-last carbon atom in the monoester can also be oxidized to an alcohol, which can be excreted as is or first oxidized to an aldehyde, ketone, or carboxylic acid. The monoester and oxidative metabolites are excreted in the urine and faeces. (A2884)

Synonyms

Dipentyl phthalate; 131-18-0; DIAMYL PHTHALATE; Di-n-pentyl phthalate; Amyl phthalate; Amoil; dipentyl benzene-1,2-dicarboxylate; di-n-Amyl phthalate; Di-n-pentylphthalate; Phthalic acid, dipentyl ester; diamylphthalate; Phthalic Acid Diamyl Ester; DTXSID5031131; Phthalic acid, diamyl ester; DPNP; Dipentyl 1,2-benzenedicarboxylate

Frequently Asked Questions

What are the CAS number and molecular formula of Di-N-pentyl phthalate?

CAS 131-18-0; molecular formula C18H26O4; molecular weight — g/mol.

What other names is Di-N-pentyl phthalate known by?

Dipentyl phthalate, 131-18-0, DIAMYL PHTHALATE, Di-n-pentyl phthalate, Amyl phthalate, Amoil.

Is Di-N-pentyl phthalate classified as hazardous?

Hazard statements reported: H400, H360.

What are the key physical properties of Di-N-pentyl phthalate?

Boiling Point: 648 °F at 760 mmHg (NTP, 1992); Boiling Point: 342 °C; Melting Point: FP: less than -55 °C; Flash Point: 357 °F (NTP, 1992).

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.