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■ Chemical Description

-- (2, 5-Dioxo-4-imidazolidinyl)urea, Allantoin

■ CAS No. 97-59-6

■ Molecular and Structural Formula C₄H₆N₄O₃

■ Characteristics

-- White crystalline powder;

■ Specification

No	Tests	Specification
No	Tests	Technical Grade	Cosmetic Grade	Medical Grade
1	Appearance	white crystalline odorless, tasteless
2	Indentification IR	/	Qualified	Qualified
3	Content(potentiometric titration)	≥98.5	98.0~102.0	98.0~101.0
4	Meltiong point	≥223	≥225	≥225
5	Loss on drying %	≤0.2	≤0.15	≤0.1
6	Residue on ignition %	≤0.1	≤0.1	≤0.1
7	PH	4.0~6.0	4.0~6.0	/
8	Specific rotation	/	-0.10°-+0.10°	-0.10°-+0.10°
9	Acidity	/	/	Qualified
10	Reductive substance	/	Qualified	Qualified
	Related substance	/	/	Qualified
	Arsenic %	≤0.0002	≤0.0002	≤0.0002
	Plumbum %	≤0.001	≤0.001	≤0.001
11	Solubility	1. (25°C,5.7g/L;40°C,11g/L;75°C,40g/L) In water, higher temperature, bigger dissolution(25°C,5.7g/L;40°C,11g/L;75°C, 40g/L) 2.Hardly soluble in propylene glycol, ethanol , glycerol

■ Application

--Used as additives in the area of skin ulcers, trauma therapy and nutritional cosmetics

■ Packaging and Storage

--Packed in 25, 50 kg fiber or plastic drum, inner lined with PE bags;

--Stored in dry place at room temperature;

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