补充描述:
Guanylthiourea (GTU, also known as Amidinothiourea, CAS 2114-02-5), used as an intermediate for famotidine and ranitidine, is a white to off-white crystalline powder with formula C2H6N4S, molecular weight 118.16, minimum 99% purity, melting point 158-163C, water content up to 0.5%, and residue on ignition up to 0.2%.
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