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Quality Control & AssuranceAbout Banner

Our Quality Control (QC) department operates on a 24 hour basis. Each of our two sites has a QC laboratory equipped with the analytical equipment required to monitor and control the processes run on the plants on both of our sites. We have three QC Specialists, with over 60 years’ (combined) experience of working in a high throughput QC Lab. Each shift team has a dedicated QC technician to carry out all analyses during their period on duty.

A key role in compliance with our authorizations is that of the Environmental Chemist. He is responsible for monitoring new process introductions and routine production. This includes vent releases and effluent analysis.

Analysis of Raw Material, In-Process, Final Product and Environmental Samples is undertaken to the appropriate ISO 9001:2015 standards to meet our customers’ requirements.

The QC and R&D laboratories work together to develop and implement new analytical methods which may be required by customers.


Quality Management System Accreditations:

ISO 9001 Certificate

ISO 14001 Certificate

ISO 22716 Certificate (product specific)

Halal Certification (product specific)

Kosher Certification(product specific)


Customer Questionnaires

Answers to many of the FAQs from customers can be found in our standard questionnaire response.



Hazardous Materials on site:

Both the Middlesbrough and Billingham sites handle a variety of hazardous materials during production.  Much of this information is commercially confidential and is therefore not openly available.  If you require more detailed information on hazardous materials handled, it may be possible to provide this upon request.

In order to obtain this information, please email

For more product specific information, this can be found within the individual product pages.


Food Allergens:

Our products are manufactured without the use or content of, and although not specifically analysed for the following, they are not expected to contain:

  • Wheat, rye, barley, oat and their hybrid strains/ derivatives.
  • Crustaceans / derivatives.
  • Eggs / derivatives.
  • Fish / derivatives.
  • Peanut / derivatives.
  • Soybean / derivatives.
  • Milk of all kinds of mammal animals. / derivatives.
  • Almonds (Prunus dulcis, sin.: Prunus amygdalus, Amygdalus communis L.) / derivatives.
  • Hazelnuts (Corylus spp.) / derivatives.
  • Cashew nuts (Anacardium occidentale) / derivatives.
  • Brazil nuts or (Bertholletia excelsa) / derivatives.
  • Macadamias (Macadamia spp.) / derivatives.
  • Nuts (Juglans spp.) / derivatives.
  • Pecans (Carya spp.) / derivatives.
  • Pistachio (Pistacia spp.) / derivatives.
  • Pine nuts (Pinus spp.) / derivatives.
  • Chestnuts (Castanea spp.) / derivatives.
  • Latex / derivatives.
  • Sulphites in concentration equal or above 10mg/Kg
  • Lupin and products thereof
  • Cotton seeds, sunflower seeds, rape seeds
  • Sugar beet


Palm Oil and Derivatives:

Products manufactured by SEQENS Custom Specialties are not currently derived from any raw materials or ingredients that contain palm oil or their derivatives and are therefore palm oil free.


Origin of Material:

Our products have been evaluated for the source of the raw materials used in their production. They are manufactured from chemicals that have no animal or human origin. There are no animal or human source raw materials or additives used in the manufacture of our products. Therefore, we can confirm that BSE/TSE (bovine spongiform encephalopathy /transmissible spongiform encephalopathy) is not a concern with our products.


Risk of Melamine Contamination:

Although we do not analyse our products for Melamine, they are not manufactured with or formulated using and, therefore, is not expected to contain Melamine.


Microbial Specification:

We do not have any microbial specifications at SEQENS Custom Specialties. Products are manufactured by SEQENS Custom Specialties using clean, well maintained multi-purpose plant following established procedures.


Genetically Modified Organisms (GMO):

Products manufactured by SEQENS Custom Specialties are not currently derived from any raw materials or ingredients that contain genetically modified organisms (GMO) or their derivatives. Our products are GMO free and require no labelling in accordance with the EU regulations EC 1829/2003 and EC 1830/2003.


Conflict Minerals Statement:

Concerning the usage of conflict minerals, SEQENS Custom Specialties has sought guidance from various governmental authorities in the United Kingdom and the OECD Due diligence guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas.

Conflict minerals in the eastern Democratic Republic of Congo (DRC) are generally defined (including the OECD due diligence guidance for responsible mineral supply chains) as Cassiterite (tin), Coltan (tantalum), Wolframite (tungsten) and Gold, or derivatives of these minerals.

Please be advised that SEQENS Custom Specialties does not knowingly use or source materials from the Democratic Republic of Congo or its adjoining countries (Angola, Burundi, Central African Republic, Republic of the Congo, Rwanda, Sudan, Tanzania, Uganda and Zambia).

If we were to become aware of supply chain obligations under the Conflict Minerals provisions we would make that information known to our downstream users as part of our obligations.


Skin and Respiratory Sensitization:

For information regarding whether any of our products contain skin or respiratory sensitizers, please consult the relevant SDS for the product concerned.


Technical Data Sheets (TDS):

SEQENS Custom Specialties has TDS documentation available for all own products.  This can be found within the individual product pages.



For enquires on REACH compliance for a particular product, please contact



Please note: If any of the above or others not mentioned are of particular concern to your end use application or process, please contact the relevant commercial representative to discuss in more detail prior to placing your order.


Please contact us if you have any questions about our Quality Control department and how it functions.