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N-[Tris(hydroxymethyl)methyl]-3-amino-2-hydroxypropansulfonic acid CAS 68399-81-5It is used as a biological buffer
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Citric acid CAS 77-92-9It is a weak organic acid, which is a natural preservative produced in citrus fruits, and also a sour additive in food and beverages.
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2-Phenoxyethanol CAS 122-99-6It is a high boiling point organic solvent which can be used for cosmetics,fragrance etc.