525-05-3O=Nc1c(O)c(S(=O)(=O)[O-])cc2cc(S(=O)(=O)[O-])ccc12.[Na+].[Na+]DMKMTGULLYISBH-UHFFFAOYSA-L安全情報は参考情報です。供給元の安全データシート(SDS)、適用法令、専門家による評価に代わるものではありません。
Warning
H302 (91.1%): Harmful if swallowed [Warning Acute toxicity, oral]
P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P317, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 45 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Chemical: 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-nitroso-, disodium salt
2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-nitroso-, disodium salt: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.
解説1-ニトロソ-2-ナフトール-3,6-ジスルホン酸二ナトリウム.ニトロソR塩ともいう.2-ナフトール-3,6-ジスルホン酸に亜硝酸を作用させると得られる.黄金色の葉状晶.pKa 7.05.水に易溶,アルコール類に微溶.コバルト(Ⅱ)に高い選択性をもつ比色試薬.N,O-二座配位子としてコバルト(Ⅱ)と錯体をつくると,空気中でただちに酸化されて,安定な赤色のコバルト(Ⅲ)錯体となる.鉄の比色定量やカリウムの沈殿滴定にも使用される.
用途コバルトの比色定量。
使用1-Nitroso-2-naphthol-3,6-disulfonic acid disodium salt is the most sensitive determination of trace cobalt reagents used for determination of cobalt and potassium-sensitive reagents.
純化方法Purify the salt by dissolution in aqueous alkali and precipitation by addition of HCl. The pKa is 7.13. [Oka & Miyamoto J Chem Soc Jpn (Pure Chem Sectn) 76 672 1955 (Chem Abstr 11882 1956I), Beilstein 11 IV 669.]
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525-05-3DTXSID7060172化学的特性YELLOWISH-ORANGE TO YELLOW-BROWN CRYST. POWDER