I am from India and I find it difficult to source quality ingredients and was pleasantly surprised to find that most of the ingredients such as xanthan gum, sodium alginate, high quality gelatin (with Bloom number specified) available with Sigma Aldrich who supply chemicals tour molecular biology lab. The manufacturer however warns that it is only for research and laboratory use. Since molecular biology and cell culture labs require ingredients of high quality (higher than for culinary purposes), are these safe to be used in food preparation? What is the difference between food grade and laboratory grade? Able