Guanyl Thiourea in Crystalline Powder Form can melt at a temperature range varying from 160°c to 164°c. Guanyl Thiourea is also known as Aminoiminoethyl thiourea; Amidinothiourea and 2-imino-4-thiobiuret. Guanyl Thiourea is available in almost white crystalline powder form. Guanyl Thiourea in Crystalline Powder Form needs to be stored in cool and dry place and packed in fibre board drums or high density poly ethylene drums in varying range of 25 kg or 50 kg as per specific requirements.