N-Nitrosophenylhydroxylamine ammonium salt

Public-database records for N-Nitrosophenylhydroxylamine ammonium salt (CAS 135-20-6), reproduced here for independent cross-checking.

Safety classification and hazard statements

Physical description and handling notes

• Cupferron appears as light yellow or cream-colored crystals or a brown crystalline solid. As a reagent in the separation of copper and iron.
• Creamy-white solid; [HSDB] Light yellow, cream-colored, or brown solid; Hygroscopic; [CAMEO] Pale yellow, odorless crystalline solid; [Alfa Aesar MSDS]
• Crystals
• Creamy-white crystals
• less than 1 mg/mL at 65.3 °F (NTP, 1992)
• Freely soluble in water

Reported physical properties

How this substance is indexed

Documented uses

• Used as an analytical reagent for separation and precipitation of metals and a quantitative reagent for vanadates, titanium, and colorimetric estimation of aluminum; [HSDB]
• As a reagent for separating Sn from Zn, and Cu from Fe from other metals. Precipitates iron quantitatively from strongly acid solution; as a quantitative reagent for vanadates with which it gives a dark-rep precipitate solution in alkali solution, for Ti with which it form as a yellow precipitate; also suitable for the coloration estimation of Al.
• Reagent chemical ... manufactured to high and well-defined standards of purity
• By treating an ether solution of beta-phenylhydroxylamine with dry ammonia gas and amyl nitrite.
• REACTION OF PHENYLHYDROXYLAMINE WITH SODIUM NITRITE IN THE PRESENCE OF HYDROCHLORIC ACID, FOLLOWED BY TREATMENT WITH AMMONIA; TREATMENT OF PHENYLHYDROXYLAMINE WITH BUTYL OR AMYL NITRITE AND AMMONIA
• Prepared from phenylhydroxylamine by treating with NaNO2 at 0 °C in presence of HCl, filtering, dissolving in ether and treating with NH3, or by treating an ether solution of phenylhydroxylamine with butyl or amyl nitrite and NH3 in the cold.

Names this substance appears under

CUPFERRON; 135-20-6; Cupferon; Kupferon; Ammonium cupferron; Ammonium-N-nitrosophenylhydroxylamine; N-Nitrosophenylhydroxylamine ammonium salt; Cupferron, ammonium salt; N-Nitroso-N-phenylhydroxylamine ammonium salt; DTXCID90352; N-Nitrosofenylhydroxylamin amonny; NCI-C03258; Ammonium N-nitrosophenylhydroxylamine; NSC-112124; Ammonium nitroso-beta-phenylhydroxylamine; N-Nitrosophenylhydroxylamin ammonium salz

Computed molecular descriptors

Database abstract

N-Nitrosophenylhydroxylamine · CAS 135-20-6 · C6H6N2O2.H3N. UNII V66QK963ED. 熔点: 325 to 327 °F (NTP, 1992); 熔点: 163.5 °C; 蒸气压: 0.0000629 [mmHg].

Source: PubChem / Wikidata; the batch COA governs where values differ.