Alkaloida Vegyeszeti Gyar

Alkaloida Vegyeszeti Gyar Rt.

Aklaloida Vegyeszeti Gyar Rt.

Janos Repasi

Tibor Timar

Imre Gulyas

Kalman Zsupan

Peter Maroy

Istvan Kiss

Vilmos Galamb

Laszlo Litkei

Istvan Gyoker

Laszlone Roka

Jozsef Vigh

Edit Fehervari

Laszlone Pethe

Fulgencio Powell Moreno

Agota Repasine Veres

Jozsef Neu

Iren Borsos Nee Safranek

Andras Fodor

Zoltan Salamon

Miklos I Zsuga

Jozsef Nagy

Istvanne Koczka

Istvan Szentkiralyi

Amdras Fodor

Istavanne Koczka

Tibor Kelen

Magdolna Bene

Judit Barkanyi

Istvan Fodor

Sandor Ondi

Marta Brendel Nee Hajnoczki

Iren Borsos Nee Spafranek

Agota Repasi

Istvan Csorvassy

Gabor Somogyi

E Biro Nee Czapary

A solid, non-hygroscopic salt of the Formula (I) ##STR1## wherein R.sup.1 is dydroxy or alkyl;

Non-hygroscopic monoammonium salts of phosphonic and phosphinic acids

Controlled release pharmaceutical preparations are prepared by homogenizing an organic or inorganic pharmaceutical active substance such as an opium alkaloid or its salts, an opium antagonist or its salts, an aliphatic or aromatic amine derivative or its salts, a phenolate type medicament, or Zn, Fe, Mg, K, Na salts, a fatty acid or its salt necessary to achieve a continuous phase transfer and an ethylene vinyl acetate copolymer and formulating the resulting homogeneous mixture by

Controlled release pharmaceutical preparation and process for preparing

A solid, non-hygroscopic salt of the Formula (I) ##STR1## wherein R.sup.1 is hydroxy or alkyl;

A process is provided for the quantitative selective complexometric analysis of a sample. First and second aliquot parts of a sample containing N-phosphonomethyl-glycine, N-carboxymethyl-N-phosphonomethyl-glycine or N,N-bis-phosphonomethyl-glycine; or N-phosphonomethyl-glycine and N,N-bis-phosphonomethyl-glycine; or N-phosphonomethyl-glycine and N-carboxymethyl-N-phosphonomethyl-glycine are taken. The first aliquot part is titrated with a bismuth volumetric solution at a Ph=1.8-2.5 in the presence of a methylethymol blue indicator. The second aliquot part is titrated with a copper volumetric solution at a Ph=8-10 in the presence of a murexide indicator. Two end point values are obtained and compared. The difference between these two values result in the determination of the content of N-phosphonomethyl-glycine in the sample.

Process for selective complexometric analysis of

The invention relates to a process for the preparation of Chromenes of the general Formula V ##STR1## prepared from chromanone derivatives.

Process for the preparation of chromene derivatives

The invention relates to a process for the preparation of chromenes of the general Formula V ##STR1## (wherein R.sup.1 and R.sup.2 are hydrogen, optionally halogeno substituted C.sub.1-6 alkyl or aryl;

Chromene derivatives and pesticidal composition comprising the same

The invention relates to pesticidal compositions comprising as active ingredient a compound of the general Formula I ##STR1## wherein R.sup.1 and R.sup.2 stand for hydrogen, optionally halogenosubstituted C.sub.1-6 alkyl or aryl;

Chromene derivatives useful as insecticides

N-phosphonomethylglycine is prepared from glycine and parsformaldehyde to obtain an intermediate which is reacted with dialkylphosphite to obtain an ester of the desired compound which is then hydrolyzed.

Process for the preparation of N-phosphonomethyl-glycine

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Tiszavasvari, Hungary

Janos Repasi