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Technical Information and Advice

The Ashford Instrumentation product datasheets found on this website contain a lot of technical information as well as a full product description. Most of our datasheets also now contan a general arrangement drawing however, we are often asked for additional information or guidance that it is difficult to include in a product datasheet. So that we can provide this additional information this section has been created to provide additional technical information and advice on subjects such as ATEX, GOST, Pressure Gauge Calibration, NACE, HART Protocol, WRAS and Galvanic Isolation to name but a few. The information contained here should be used in conjunction with guidance and advise from other regulatory bodies or suppliers. If you wish to discuss any of the information found in this section or require additional information, please do not hesitate to contact either our Quality Manager or Sales Team on +44 (0)1233 730999

FDA Approved Full Fluid - Marcol 52 For Hygienic Seals



Ashford instrumentation can offer a wide variety of fill fluids for our range of chemical seals and hygienic seals. On applications requiring a 'food grade' fill fluid (generally for pharmaceutical applications in the food, drink or pharmaceutical market) we use Marcol 52. The details are as follows:


Marcol 52- Medicinal grade White Oil

Product Description

Marcol 52 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.

Marcol 52 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.


Marcol 52 can be used in a variety of food related, cosmetic and pharmaceutical applications subject to the applicable laws and regulations in each country (* See Note Below).


Marcol 52 is used as a component of a great variety of cosmetic products:

  • Cleansers
  • Hair care products
  • Neutral and protective diluents for other cosmetic ingredients such as essential oils
  • Other applications such as make-ups and make-up removers.

Marcol 52 provides many practical advantages to the formulation specialist:

  • Excellent skin compatibility, low irritancy and comedogenicity
  • Very good balance between resistance to bacteria and final biodegradability, with minimal environmental impact.

Marcol 52 offers a high level of safety, thanks to its high purity (absence of toxic polycyclic aromatics, heavy metals), the complete destruction of germs in the high temperature manufacturing process, and specific packaging and handling procedures. Major uses are:

  • Adjuvant in vaccines for animals (cattle, chickens, and pigs) where its low viscosity offers optimal efficacy.
  • Gelatine capsule manufacture.

(*) User must check compliance with applicable regulations. As an example, at the date of publication of this document, Marcol 52 can be used as a food additive in USA subject to applicable FDA regulations, while it cannot be used as a direct food additive in European Union Member States.

Properties and Specifications

Marcol 52 meets the requirements of the following specifications:

  • USA FDA, 21 CFR 172.878 and 21 CFR 178.3620(a), White Mineral Oil
  • US Pharmacopeia/National Formulary , most recent edition, Light Mineral Oil
  • National Sanitation Foundation (NSF), category H1, registration number 123205
  • Purity requirements of European Pharmacopoeia, most recent edition, Light Liquid Paraffin (*)
  • The Japan's Specifications and Standards for Food additives, Liquid Paraffin

(*): Marcol 52 while not being covered by the European Pharmacopoeia due to its light viscosity, meets all the purity test requirements of this Pharmacopoeia.

Additional Information

CAS number: 8042-47-5

EINECS number: 232-455-8

INCI name (Europe): Paraffinum Liquidum