Product Description

Primol 542 is a purified mixture of liquid saturated hydrocarbons. It is a colourless, transparent oily liquid and is essentially odourless and tasteless. It is obtained from petroleum through several refining stages, including an ultimate purification by catalytic hydrogenation.

Primol 542 is manufactured to exceed the purity requirements of the Pharmacopoeias Due to its superior chemical inertness, it demonstrates better colour and oxidative stability than most mineral and vegetable oils, when stored and used under controlled conditions.

ExxonMobil White Oils are produced and controlled according to the ExxonMobil Product Quality Management System, EN ISO 9000 or equivalent standard.


Primol 542 can be used in a variety of food-related, cosmetic and pharmaceutical applications subject to the applicable laws and regulations in each country (*).


Primol 542 is recommended as a food packaging-grade plasticizer in Polystyrene. It offers an outstandingly low volatility but due to its high molecular weight, it is best used in grades at relatively low oil content, in order to maintain transparency for General Purpose PS grades.

Primol 542 is recommended for use as an external lubricant for non-plasticized PVC.

Elastomers and Adhesives

Primol 542 is used for producing food-contact or medical rubber articles, such as EPDM or butyl rubber. Because of its extremely low volatility, it is particularly well suited for the extension of Thermoplastic Elastomers when low fogging properties are required.

Primol 542 is also recommended for Hot-Melt Adhesives formulations used in sanitary products.

(*) User must check compliance with applicable regulations.

Properties and Specifications

Primol 542 meets the requirements of the following specifications:

  • USA FDA, 21 CFR 178.3620(a), White Mineral Oil
  • US Pharmacopoeia, most recent edition, Mineral Oil
  • National Sanitation Foundation (NSF), category H1, registration number 125039
  • Purity requirements of European Pharmacopoeia, most recent edition, Liquid Paraffin (*)
  • • Europe Regulation (EU) 10/2011 on plastic material and articles intended to come into contact with foodstuff, White mineral oil

(*): Primol 542 while not being covered by the European Pharmacopoeia due to its high viscosity, meets all the purity test requirements of this Pharmacopoeia

CAS number: 8042-47-5

EINECS number: 232-455-8

INCI name (Europe): Paraffinum Liquidum

CTFA Dictionary name (USA): Mineral Oil

Typical values may vary within modest ranges and specifications may be subject to change.

Specification Specification
Property Test Method Typical Value Min. Max.
Appearance Visual Clear and Bright Clear and Bright
Odor Olfactory Odorless or almost odorless Odorless or almost odorless
Color, Saybolt ASTM D 156 + 30
Kinematic Viscosity @ 40°C, mm²/s ASTM D 445 90.0 110.0
Kinematic Viscosity @ 100°C, mm²/s ASTM D 445 11
Density @ 15ºC, kg/m³ ASTM D 4052 866 876
Relative Density @ 20ºC/20 °C ASTM D 4052 0.864 0.875
Relative Density @ 25 °C/25 °C ASTM D 4052 0.862 0.873
Pour Point, ºC ASTM D 5950 -12
Flash Point, ºC ASTM D 92 250
Refractive Index, nD²º ASTM D 1218 1.472 1.480
Average Molecular Weight ASTM D 2502 510
Hydrocarbons with less than 25 carbons, wt % ASTM D 6352 2
Volatility @10 mm Hg, temp (°C ) at which 2.5 % off ASTM D 1160 294
Volatility @10 mm Hg, temp (°C ) at which 5 % off ASTM D 1160 298 292
Volatility @10 mm Hg, temp (°C ) at which 10 % off ASTM D 1160 303 302
Carbon Type, % and Paraffinic / Naphthenic / Aromatic AM-S 1805 69 / 31 / 0

Health and Safety

Detailed health and safety information for this product is provided in the Material Safety Data Sheet (MSDS), available upon request through your local sales representative or from

Storage and Handling

Recommended storage and handling procedures for ExxonMobil white oil products arre summarised in a separate bulletin available upon request through your local sales representative or from

Further Information

ExxonMobil supplies a range of white oils, process oils, waxes, bitumen and a full range of other lubricants, fuels and chemical products worldwide. Please contact your local ExxonMobil representative, or contact us at, for more information on other products.


It cannot be guaranteed that the product information given above is up to date. For the latest version of the Product Data Sheet we refer to the product library of ExxonMobil.