Esters Available — Bulk Only

Di-n-Butyl Phthalate (DBP)

CAS 84-74-2 · Formula C16H22O4 · MW 278.34 g/mol

An ortho-phthalate plasticizer and process aid for flexible polymer and coating performance. It is used as a plasticizer, as a chemical intermediate in organic synthesis, and as a laboratory reagent; it is also used in synthetic perfume bases.

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UN Number
UN 3082
Hazard Class
Class 9
HS Code
2917.34
At a Glance
Material Family
Esters
Record Type
Pure compound
Primary Role
Plasticizing · Solvency
Solubility
< 1 mg/mL at 20 °C
Functional Roles
DIBUTYL PHTHALATE
FRAGRANCEPERFUMINGPLASTICISERSOLVENT
Applications & Use Cases
  • Plasticizer: Flexibilizer for polymers, films, and coatings
  • Chemical intermediate: Synthesis of dyes, phthalimide, and anthranilic acid
  • Laboratory reagent: Analytical and laboratory reagent
  • Fragrance: Component in synthetic perfume bases
Physical Properties
Melting Point
-35 °C
Boiling Point
340 °C at 760 mmHg
Density
1.049 at 20 °C
Solubility
< 1 mg/mL at 20 °C
Vapor Pressure
1 mmHg at 147 °C; 1.1 mmHg at 150 °C
Flash Point
157 °C
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

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DOT / UN Transport Classification
DOT hazard class 9 placard
UN / DOT NumberUN 3082
Hazard Class / DivisionClass 9
Proper Shipping NameEnvironmentally hazardous substance, liquid, n.o.s.

Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.

HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
2917 . 34
Chapter 29
Organic chemicals
Heading 29.17
Internationally harmonized (WCO HS)
Subheading 2917.34
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
84-74-2
Molecular Formula
C16H22O4
Molecular Weight
278.34 g/mol
IUPAC Name
dibutyl benzene-1,2-dicarboxylate
INCI Name
DIBUTYL PHTHALATE
PubChem CID
InChI Key
DOIRQSBPFJWKBE-UHFFFAOYSA-N
Synonyms & Trade Names
dibutyl phthalate Di-n-butyl phthalate n-Butyl phthalate Butyl phthalate Genoplast B Palatinol C Celluflex DPB Unimoll DB DIBUTYLPHTHALATE Staflex DBP Elaol Ergoplast FDB Hexaplas M/B Witcizer 300 Kodaflex DBP Dibutyl 1,2-benzenedicarboxylate dibutyl benzene-1,2-dicarboxylate Dibutyl-o-phthalate DBP (ester)
Full Description

Di-n-butyl phthalate (CAS 84-74-2) is an ester of ortho-phthalic acid. It is used as a plasticizer, as a chemical intermediate in organic synthesis, and as a laboratory reagent; it is also used in synthetic perfume bases.

Frequently Asked Questions

What is di-n-butyl phthalate used for?

Di-n-butyl phthalate (DBP, CAS 84-74-2) is primarily used as a plasticizer to flexibilize polymers, films, and coatings. It also serves as a chemical intermediate in the synthesis of dyes, phthalimide, and anthranilic acid, as a laboratory reagent, and as a component in synthetic perfume bases.

What are the other names for di-n-butyl phthalate?

It is commonly abbreviated DBP and is also referred to as dibutyl phthalate or n-butyl phthalate. The unambiguous identifier for procurement is CAS 84-74-2 (molecular formula C16H22O4), an ester of ortho-phthalic acid.

How is di-n-butyl phthalate shipped and classified for transport?

For transport documentation it is associated with UN 3082 (N-butyl phthalate). Its HS classification is 2917.34 (esters of orthophthalic acid: other). Refer to the product SDS for the full transport profile and packaging requirements before booking freight.

Is di-n-butyl phthalate the same as DEHP?

No. DBP (CAS 84-74-2) is the di-n-butyl diester, while DEHP is di(2-ethylhexyl) phthalate, a separate compound with a different CAS and longer alkyl chains. Both are ortho-phthalate plasticizers but are not interchangeable in specification.

What is the cost of bulk di-n-butyl phthalate?

Bulk pricing depends on grade, packaging (drums, IBCs, totes), volume, and destination. Request a current quote with your target quantity and ship-to location; we supply a CoA and SDS with each shipment.

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.