Empirical Formula: C₁₂H₁₃NO₄S
Molecular Weight: 267.3009
EINECS: 209-605-6 
Flash Point: 152.8 °C
Appearance: White to off-white powder
Enthalpy of Vaporization: 54.22 kJ/mol
Boiling Point: 302 °C at 760 mmHg
Vapour Pressure: 0.00102 mmHg at 25 °C
Structure of Structure of Diphenylamine sulfate (CAS NO.587-84-8):
                      
IUPAC Name: N-Phenylaniline ; Sulfuric acid
Canonical SMILES: C1=CC=C(C=C1)NC2=CC=CC=C2.OS(=O)(=O)O
InChI: InChI=1S/C12H11N.H2O4S/c1-3-7-11(8-4-1)13-12-9-5-2-6-10-12;1-5(2,3)4/h1-10,13H;(H2,1,2,3,4)
InChIKey: IPZMDJYHJNHGML-UHFFFAOYSA-N

Reported in EPA TSCA Inventory.

Poison by intraperitoneal route. When heated to decomposition it emits toxic fumes of NO_x. See also SULFATES.
Hazard Codes: Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 37/39-26 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S37/39:Wear suitable gloves and eye/face protection.

 Diphenylamine sulfate , its cas register number is 587-84-8. It also can be called Diphenylammonium hydrogen sulphate ; Diphenylamine, hydrogen sulfate ; and Benzenamine, N-phenyl-, sulfate (1:1) . It is hazardous, so the first aid measures and others should be known. Such as: When on the skin: first, should flush skin with plenty of water immediately for at least 15 minutes while removing contaminated clothing. Secondly, get medical aid. Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Then get medical aid soon. While, it's inhaled: Remove from exposure and move to fresh air immediately. Give artificial respiration while not breathing. When breathing is difficult, give oxygen. And as soon as to get medical aid. Then you have the ingesting of the product : If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.
In addition, Diphenylamine sulfate (CAS NO.587-84-8) could be stable under normal temperatures and pressures. It is not compatible with strong oxidants. And also prevent it to broken down into hazardous decomposition products: irritating and toxic fumes and gases.