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
C4H4N²O²
Molecular Structure
Category
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 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)

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