The 3,4-Diaminothiophene dihydrochloride with cas registry number of 90069-81-1 is grey or brown crystalline powder. Both its systematic name and IUPAC name are the same which is called thiophene-3,4-diamine dihydrochloride. This chemical belongs to the following categories: functional materials; thiophene derivatives (for conduting polymer research).

The physical properties about this chemical are: (1)# of Rule of 5 Violations: 0; (2)ACD/BCF (pH 5.5): 1; (3)ACD/BCF (pH 7.4): 1; (4)ACD/KOC (pH 5.5): 16; (5)ACD/KOC (pH 7.4): 17; (6)#H bond acceptors: 2; (7)#H bond donors: 4; (8)#Freely Rotating Bonds: 2; (9)Flash Point: 186.9 °C; (10)Enthalpy of Vaporization: 64.67 kJ/mol; (11)Boiling Point: 385.5 °C at 760 mmHg; (12)Vapour Pressure: 2.55E-06 mmHg at 25°C.

When you are using this chemical, please be cautious about it as the following:
This chemical is harmful by inhalation, in contact with skin and if swallowed. It also has the danger of very serious irreversible effects. Hence, when you are using it, avoid contact with skin and eyes. This chemical should be stored at temperature of 0-6°C.

You can still convert the following datas into molecular structure:
(1)SMILES: Cl.Cl.Nc1cscc1N;
(2)InChI: InChI=1/C4H6N2S.2ClH/c5-3-1-7-2-4(3)6;;/h1-2H,5-6H2;2*1H;
(3)InChIKey: RAMOMCXNLLLICQ-UHFFFAOYA