Mercury and its compounds are on the Community Right-To-Know List. Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

OSHA PEL: CL 0.1 mg(Hg)/m³ (skin)
ACGIH TLV: TWA 0.1 mg(Hg)/m³ (skin); BEI: 35 µg/g creatinine total inorganic mercury in urine preshift; 15 µg/g creatinine total inorganic mercury in blood at end of shift at end of workweek.
DFG MAK: Confirmed Animal Carcinogen with Unknown Relevance to Humans
NIOSH REL: (Mercury, Aryl and Inorganic) CL 0.1 mg/m³ (skin)
DOT Classification:  6.1; Label: Poison

The Phenylmercuric nitrate, with the CAS registry number 55-68-5, is also known as Mercuriphenyl nitrate. Its EINECS number is 200-242-9. This chemical's molecular formula is C₆H₅HgNO₃ and molecular weight is 339.70. What's more, its systematic name is (Nitrato-kappaO)(phenyl)mercury. Its classification codes are: (1)Agricultural Chemical; (2)Mutation data; (3)Organometallic; (4)Pharmaceutic aid [antimicrobial agent]; (5)Unspecified / Unclassified pesticide.

Physical properties of Phenylmercuric nitrate are: (1)#H bond acceptors: 4; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 3; (4)Polar Surface Area: 55.05 Å².

You can still convert the following datas into molecular structure:
(1)SMILES: [O-][N+](=O)O[Hg]c1ccccc1
(2)Std. InChI: InChI=1S/C6H5.Hg.NO3/c1-2-4-6-5-3-1;;2-1(3)4/h1-5H;;/q;+1;-1
(3)Std. InChIKey: PDTFCHSETJBPTR-UHFFFAOYSA-N

The toxicity data is as follows: