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Certificate of Analysis

Product:	Gram's Stain Pack
Code:	HS800-NR
Lot:	251171
Issue Number:	1
Issue Date:	18/12/2025
Expiry Date:	2027/11
Date of Production:	18/12/2025
Storage:	Store in a cool, dry, well-ventilated place.
HS800-NR consists of a pack of reagents suitable for use in the Gram's Stain technique with Neutral Red (Jensen) as counterstain.
Notes: Certificate will be updated with additional testing results for HS232 when these are available. Check our website for Dyes and Stains certificate updates.

Kit components:

Product:	Crystal Violet Oxalate (Gram)
Code:	HS232
Lot:	250930
Issue Date:	18/09/2025
Expiry Date:	2028/09
Date of Production:	11/09/2025
HS232 is a soution of crystal violet oxalate which is suitable for use in the Gram Stain technique.
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

Product:	Grams' Iodine Diluent
Code:	HS305X
Lot:	251170
Issue Date:	18/12/2025
Expiry Date:	2027/11
Date of Production:	24/11/2025
This product has been checked against the current TCS specification for the following test(s):
		Result
Visual QC check	SOP Manual 6	Conforms

Product:	Grams' Iodine Concentrate
Code:	HS305Y
Lot:	250623
Issue Date:	19/06/2025
Expiry Date:	2028/06
Date of Production:	05/06/2025
This product has been checked against the current TCS specification for the following test(s):
		Result
Functionality test	SOP 6A.2	Conforms
Iodine colour check	SOP 6A.17	Conforms

Product:	Gram's Decolouriser
Code:	HS310
Lot:	250628
Issue Date:	31/07/2025
Expiry Date:	2028/06
Date of Production:	05/06/2025
HS310 is a mixture of acetone and iso-propanol suitable for use as a decolouriser in the Gram Stain technique.
This product has been checked against the current TCS specification for the following test(s):
		Result
Functionality test	SOP 6A.2	Conforms
Visual QC check	SOP Manual 6	Conforms

Product:	Neutral Red (Jensen)
Code:	HS570
Lot:	250627
Issue Date:	19/06/2025
Expiry Date:	2028/06
Date of Production:	05/06/2025
HS570 is a solution of Neutral Red which is suitable for use as a counterstain in the Gram's Stain technique.
This product has been checked against the current TCS specification for the following test(s):
		Result
Spectrophotometric analysis	SOP 6A.16	Conforms
Functionality test	SOP 6A.2	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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