Vitamin B1, also known as Thiamine, named "thio-vitamine" (sulphur-containing vitamins). Molecular formula C12H17N4OS+. It is one of the 13 essential vitamins for the human body. It is a water-soluble vitamin and belongs to the vitamin B family. It was eventually designated the generic denomination vitamin B1. Its phosphate derivatives participate in many cellular processes. The best form is thiamine pyrophosphate (TPP), a coenzyme for the catabolism of sugars and amino acids.

Analysis Item	Unit	Specification	Test Method			Result
Appearance	----	White or almost white crystals or crystalline powder	Eyeballing			Almost white crystalline powder
Solubility	----	Sparingly soluble in water,freely soluble in boiling water,slightly soluble in ethanol and in methanol, very slightly soluble in chloroform.	Physical and chemical testing			Conform
Identification	----	Meet the requirement	IR, Physical and chemical identification			Conform
Assay	%	98.0～101.0 (Dried substance)	Potentiometric titration			99.7
pH	----	6.8～7.5	pH meter			7.1
Appearance of Solution	----	Clear and not more intensely coloured than the reference solution	Colorimetric method			Conform
Loss on Drying	%	≤1.0	Oven-drying method			0.14
Sulphated Ash/Residue on Ignition	%	≤0.1	Muffle			0.04
Chloride	%	≤0.06	Colorimetric method			＜0.06
Any impurity	%	≤1.0	HPLC			0.06
Total impurity	%	≤1.5	HPLC			0.16
Related Compounds	%	≤1.0	HPLC			0.23
Lead	mg/kg	≤ 2	Flame Atomic Absorption Spectrophotometric			＜2
Residual Solvent	ppm	≤3000	GC			ND
Conclusion: This batch of VITAMIN B1 Thiamine Mononitrate meets the requirements of  BP2015/USP43.

1. It can protect the nervous system and promote gastrointestinal motility and increase appetite.    
2. It mainly plays the role of sugar and sugar (starch) in the process of digestion in the food, and finally produces energy; at the same time, it is necessary for muscle coordination and maintenance of nerve conduction.
3. It also has a moderate diuretic effect.