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Certificate of Analysis

Product:	Periodic Acid Schiff (PAS) Stain Kit
Code:	HS462
Lot:	251222
Issue Number:	1
Issue Date:	18/12/2025
Expiry Date:	2027/11
Date of Production:	08/12/2025
Storage:	Store at 2-8oC
HS462 consists of a pack of reagents suitable for the histological demonstration of and distinction between acid and neutral mucins in tissue samples.
Notes: Certificate will be updated with additional testing results for HS265 & HS345 when these are available. Check our website for Dyes and Stains certificate updates.

Kit components:

Product:	Periodic Acid (1% aqueous)
Code:	HC6405
Lot:	251149
Issue Date:	27/11/2025
Expiry Date:	2027/11
Date of Production:	17/11/2025
HC6405 is aqueous solution of periodic acid suitable for use in the demonstration of and distinction between acid and neutral mucins in tissue samples.
This product has been checked against the current TCS specification for the following test(s):
		Result
Visual QC check	SOP Manual 6	Conforms

Product:	Feulgen Stain (Schiff)
Code:	HS265
Lot:	251150
Issue Date:	27/11/2025
Expiry Date:	2028/11
Date of Production:	17/11/2025
HS265 is a reagent used to test for aldehydes and ketones and in histochemistry to detect polysaccharides, DNA and proteins. It consists of a solution of pararosaniline hydrochloride that has been decolourised by sulphur dioxide. Aliphatic aldehydes restore the pink immediately, whereas aromatic ketones have no effect on the reagent. Aromatic aldehydes and aliphatic ketones restore the colour slowly. HS265 may also be used in any other technique when Feulgen stain is specified.
Notes: Certificate will be updated with additional testing results when these are available. Check our website for Dyes and Stains certificate updates.
This product has been checked against the current TCS specification for the following test(s):
		Result
Visual QC check	SOP Manual 6	Conforms

Product:	Haematoxylin Gill 3
Code:	HS345
Lot:	251204
Issue Date:	18/12/2025
Expiry Date:	2027/12
Date of Production:	02/12/2025
HS345 Haematoxylin Gill 3 is a stabilised acid-alum-haematoxylin solution which is suitable for use as a regressive nuclear stain to demonstrate acidic cell components, or as a counterstain in histology and clinical cytology to differentiate nuclei, cytoplasm and squamous cells under microscopic examination.
Notes: Certificate will be updated with additional testing results when these are available. Check our website for Dyes and Stains certificate updates.
This product has been checked against the current TCS specification for the following test(s):
		Result
Spectrophotometric analysis	SOP 6A.16	Conforms

For professional use only.

Approved by QC.

TCS Biosciences Ltd - Quality Control Department TCS Biosciences Ltd
Botolph Claydon
Buckingham
MK18 2LR
United Kingdom

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