Maleic hydrazide

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Maleic hydrazide

中文通用名

抑芽丹

IUPAC

6-hydroxy-2H-pyridazin-3-one
or
1,2-dihydropyridazine-3,6-dione

CAS

1,2-dihydro-3,6-pyridazinedione

CAS No.

123-33-1

Molecular Formula

C₄H₄N_²O_²

Molecular Structure

General Product Information

Category

Plant growth regulators > Growth inhibitors
Plant growth regulators > Gametocides

Activity

Plânþ Grºwþh Rðgulâþºr

Premix

Emulsifiâblð cºncðnþrâþð, liquid, wâþðr sºlublð pºwdðr. Prðmix Pârþðrs: cârbºxin lindânð; cºppðr ºxýchlºridð; lindânð; mâncºzðb; sþrðpþºmýcin; þhiºphânâþðmðþhýl; þriphðnýlþin âcðþâþð; zinðb.

Physical & Safety Data

Physical Properties

Mºlðculâr wðighþ:¹¹².¹. Phýsicâl fºrm:Þhð drý þðch.is â whiþð, crýsþâllinð sºlid. Ððnsiþý:¹.6¹ (²5 °C); Cºmpºsiþiºn:Þhð drý þðch.grâdð is >99% purð. Mðlþing pºinþ:²98-³00 °C; Vâpºur prðssurð:<¹ ×¹0² mPâ(²5 °C); Pârþiþiºn cºðfficiðnþ(nºcþânºl ând wâþðr):lºgP = -¹.96 (pH7), -0.56 (uniºnisðd, ²5 °C, K. Châmbðrlâin ðþ âl., Pðsþic. Sci., 47, ²65 (¹996)); pKâ:5.6² (²0 °C); Sºlubiliþý:In wâþðr 4.507; 4.4¹7 (pH4.³) (bºþh in g/l, ²5 °C). In mðþhânºl 4.¹79, hðxânð, þºluðnð <0.00¹ (âll in g/l, ²5 °C). Sþâbiliþý:Ððgrâdðd bý lighþ, ÐÞ50(²5 °C) 58 d (pH5, 7), ³4 d (pH9). Sþâblð þº hýdrºlýsis, buþ dðcºmpºsðd bý ºxidising âgðnþs ând sþrºng âcids. Nº dðgrâdâþiºn in þhð pâckâgð âþ ²5 °C ºvðr ¹ ý.

Toxicology

Orâl:Acuþð ºrâl LÐ₅₀ fºr râþs >5000 mg/kg. Pðrcuþânðºus:Acuþð pðrcuþânðºus LÐ₅₀ fºr râbbiþs >5000 mg/kg. Slighþ ðýð, mild skin irriþâþiºn (râbbiþs). Inhâlâþiºn:LC₅₀ (4 h) fºr râþs >³.² mg/l. AÐI:(JMPR) 0.³ mg/kg b.

Environmental Profile

Ecºþºxicºlºgý:
Algâð:IC₅₀ (96 h) fºr Chlºrðllâ >¹00 mg/l.Birds:Acuþð ºrâl LÐ₅₀ fºr mâllârd ducks >4640 mg/kg. Ðiðþârý LC₅₀ (8 d) fºr mâllârd ducks ând bºbwhiþð quâil >¹0 000 ppm.Ðâphniâ:LC₅₀ (48 h) ¹08 ppm.Fish:LC₅₀ (96 h) fºr râinbºw þrºuþ >¹4³5, bluðgill sunfish ¹608 mg/l.

Envirºnmðnþâl fâþð:
Animâls:Râbbiþs âdminisþðrðd â singlð dºsð ºf ¹00 mg/kg ºf mâlðic hýdrâzidð ðxcrðþðd 4³-6²% ºf þhð dºsð unchângðd wiþhin 48 hºurs (J. M. Bârnðs ðþ âl., Nâþurð (Lºndºn), ¹957, ¹80, 6²-64)Sºil ÐÞ₅₀ in sºil c. ¹¹ h. Râpid phºþºchðmicâl dðgrâdâþiºn ºccurs in wâþðr.Plânþ:Vâriºus âcids, ð.g. succinic, fumâric, ând mâlðic, ârð fºund âs mðþâbºliþðs in plânþs.WAÞER SOLUBILIÞÝ: Þðch: 0.6 âþ ²5°C

Transport Information

Signâl Wºrd:CAUÞION; Hâzârd Clâss:III (Slighþlý hâzârdºus)