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Product details
名称
沙黄复染液
分子类型
生物试剂/缓冲液
英文别名
Safranin Stain
英文名称
Safranin O Solution
货号
S774779-100ml
包装规格
100ml
级别
BioReagent
储存温度
避光,室温
运输条件
常规运输
稳定性与储存
Store at room temperature long term (12 months). Store in the dark.
敏感性
Light-sensitive
产品介绍
沙黄,分子式为C₂₀H₁₉ClN₄,分子量为350.85,CAS号为477-73-6,易溶于水成红色溶液,溶于乙醇成红色带黄红色荧光。对盐酸为蓝红色溶液,过多则呈紫色,大量过多则转为蓝色;对氢氧化钠则生成桲红色沉淀;硫酸则为绿色溶液,稀释时先变成蓝色,渐变成紫色,最终变为红色。 革兰氏染色法革兰氏染色法,是指细菌学中广泛使用的一种重要的鉴别染色法,属于复染法。革兰染色法一般包括初染、媒染、脱色、复染等四个步骤。未经染色的细菌,由于其与周围环境折光率差别甚小, 故在显微镜下极难区别。经染色后,阳性菌呈紫色,阴性菌呈红色,可以清楚地观察到细菌的形态、排列 及某些结构特征,从而用以分类鉴定。其染色原理是通过结晶紫初染和碘液媒染后,在细菌细胞壁内形成了不溶于水的结晶紫与碘的复合物,再用95%乙醇进行脱色。 沙黄复染液主要由沙黄组成,经常与结晶紫、碘液配合使用,适用于检测革兰氏阳性菌和革兰氏阴性菌。该产品仅用于科研实验,不可做他用。 使用说明: 1、涂片:取待检细菌,于载玻片中央涂成薄层或者或在载玻片上滴加少许无菌水,取菌液与水混合均匀,涂成薄层。 2、干燥:涂片后在室温下自然干燥,也可在酒精灯上略加温,使之迅速干燥。 3、固定:手持载玻片一端,标本面朝上,在酒精灯的火焰外侧快速来回移动3~5次,每次1s,温度不宜过高,防止菌体蛋白变性,放置待凉后染色。也可以用甲醇或乙醇固定。 4、初染:滴加结晶紫染色液染色,清水冲洗去染色液。 5、媒染:滴加Gram碘液后,盖上载玻片,室温放置并水洗。 6、脱色:滴加脱色液,轻微摇动,直至流下的脱色液不再出现紫色时为止,立即用水冲去脱色液,终止反应。 7、复染:滴加沙黄染色液染色并水洗。 8、加盖洁净的盖玻片,轻压制成压片。 注意事项: 1、涂片之前应事先在背面做好圆圈标记,以便判断后续实验的位置。 2、待检测细菌的培养时间会影响染色效果,如果阳性菌培养过长或已死亡或细菌自溶解,都常呈阴性反应。 3、为了您的安全和健康,请穿实验服并戴一次性手套操作。
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Research chemical 100ml

Research chemical 100ml; supplied for laboratory research, analysis, inspection, and scientific procurement use; specifications: 100ml.

item number:S774779-100ml
Product model:100ml
level: 100ml
Lead Time:30days
sold 459 Items
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100ml

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