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Pyrogallic Acid

Potassium pyrogaiiate (oxygen in gas analysis) weigh out 5 g of pyrogallol (pyrogallic acid), and pour upon it 100 mL of a KOH solution. If the gas contains less than 28% of oxygen, the KOH solution should be 500 g KOH in a liter of water if there is more than 28% of oxygen in the gas, the KOH solution should be 120 g of KOH in 100 mL of water. [Pg.1195]

Pyrochroite [1310-97-0] Pyrodextrins Pyroelectricity Pyroelectrics Pyrogallic acid [87-66-1] Pyrogallol... [Pg.831]

Adolph Baeyer is credited with the first recognition of the general nature of the reaction between phenols and aldehydes in 1872 ([2,5-7] [18], Table 5.1). He reported formation of colorless resins when acidic solutions of pyrogallic acid or resorcinol were mixed with oil of bitter almonds, which consists primarily benzaldehyde. Baeyer also saw resin formation with acidic and basic solutions of phenol and acetaldehyde or chloral. Michael and Comey furthered Baeyer s work with additional studies on the behavior of benzaldehyde and phenols [2,19]. They studied a variety of acidic and basic catalysts and noted that reaction vigor followed the acid or base strength of the catalyst. Michael et al. also reported rapid oxidation and darkening of phenolic resins when catalyzed by alkaline materials. [Pg.870]

Brenz-essigather, -essiggeist, m. acetone, gallusskure, /. pyrogallic acid, pyrogallol. -harz, n. empyreumatic resin. [Pg.82]

Pyrogallic Acid Pyrogallol Pyrogentisic Acid Pyromucic Aldehyde Pyroxylic Spirit Pyroxylic Solution Quicklime Quicksilver Quinol Quinoline... [Pg.80]

Nitrilotriacetic Acid and Salts Triethylene Glycol Ethoxy Triglycol Pyrogallic Acid Gallic Acid Glycerine Triethanolamine T rilsobutylaluminum T richloroethylene T richloroethylene Trichloroethylene Trimethylamine Tert-Butylamine... [Pg.90]

PYROGALLIC ACID 1.2.3- Benzenetriol, Pyrogaliol, 1.2.3- Trihydroxy-benzene NL 1 1 0 ... [Pg.108]

Pyrogallic Acid — Fire Hazards Flash Point (deg. F) Not pertinent this is a combustible solid ... [Pg.436]

To develop the picture, first immerse it for a few minutes in a dish of distilled water, then pour over it the nsual pyrogallic acid developer, to which a drop or two of a tliirty-gmin solution of nitrate of silver are added. The image comes out, and is developed aa quickly as an ordinary wet collodion plate. It is then washed and finished in the usual way. [Pg.702]

Alkaline pyrogallol (aqueous) 15 g pyrogallic acid in 100 mL of 50% aqueous KOH... [Pg.43]

Synonyms 1,2,3-trihydroxybenzene pyrogallic acid 1,2,3-benzenetriol Formula C6H503 Stmcture ... [Pg.372]

Unless a formula specifically calls for distilled water, in most cases tap water can be used. Even when distilled water is indicated, good quality, filtered tap water will usually suffice. A notable exception is those formulas which call for the use of pyrocatechin (catechol) or pyrogallic acid (pyro or pyrogallol). [Pg.166]

Trade Names Piral, Pyro, Pyrogallic acid,Trihydroxybenzene. [Pg.190]

Distilled water, 750.0ml Sodium bisulfite, 20.0g Metol, 20.0 g Pyrogallic acid, 150.0g Ascorbic acid, 10 g Potassium bromide, 1.5 g EDTA tetrasodium, 2.0-5.0g Distilled water to make 1.0 liter... [Pg.235]

Pyrogallol (pyrogallic acid).—According to A. G. Perkin and F. M. Perkin,3 purpurogallin CuEgOs, can readily be obtained by electrochemical oxidation of pyrogallol in dilute sulphuric acid with addition of sodium sulphate at a platinum-iridium anode. [Pg.202]

Fill each pie plate full of cold water. To plate No. 1 add 2 teaspoonfuls of pyrogallic acid or hydroquinone. Don t put anything into the water in pie plate No. 2. In pie plate No. 3 put 2 teaspoonfuls of sodium thiosulfate. Don t... [Pg.81]

See other pages where Pyrogallic Acid is mentioned: [Pg.336]    [Pg.336]    [Pg.405]    [Pg.928]    [Pg.251]    [Pg.21]    [Pg.35]    [Pg.35]    [Pg.505]    [Pg.314]    [Pg.652]    [Pg.25]    [Pg.80]    [Pg.80]    [Pg.137]    [Pg.500]    [Pg.691]    [Pg.700]    [Pg.702]    [Pg.375]    [Pg.377]    [Pg.831]    [Pg.508]    [Pg.125]    [Pg.20]    [Pg.59]    [Pg.19]    [Pg.81]    [Pg.83]    [Pg.83]    [Pg.652]    [Pg.268]   
See also in sourсe #XX -- [ Pg.436 ]

See also in sourсe #XX -- [ Pg.619 ]

See also in sourсe #XX -- [ Pg.26 , Pg.359 ]

See also in sourсe #XX -- [ Pg.359 ]

See also in sourсe #XX -- [ Pg.104 ]

See also in sourсe #XX -- [ Pg.2 , Pg.637 ]

See also in sourсe #XX -- [ Pg.441 ]

See also in sourсe #XX -- [ Pg.108 , Pg.233 , Pg.658 ]



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Acid Hydrochloric Pyrogallic

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