1,3-Diaminoguanidine Monohydrochloride (DAG HCl, CAS 36062-19-8; EINECS 252-854-0) is a nitrogen-rich guanidine intermediate, molecular formula CH7N5·HCl, MW 125.56, supplied as a white crystalline solid with purity ≥98.0% (GC) and strictly controlled hydrazine content ≤0.3%. It is the key intermediate for robenidine hydrochloride (anticoccidial veterinary API), and a versatile building block for 1,2,4,5-tetrazines, 4-amino-1,2,4-triazoles, high-nitrogen energetic materials and nitrogen-rich chelators for heavy-metal adsorbents / COF research. Non-dangerous goods (no UN number) — ships worldwide as general cargo. Standard packaging: 25 kg fiber drum with double PE liner; kilogram sample packs available. Batch COA with every shipment; SDS and REACH/TSCA regulatory support. Manufacturer-direct supply from Anhui Royal Chemical Co. (Royalchem), China.