伊红Y二钠盐 [水溶伊红, 曙红Y二钠盐],Eosin Y disodium salt;for microscopy Certistain®, Dye, ≥85% spectrophotometric assay

别名:2′,4′,5′,7′-四溴荧光素 二钠盐, Bromo acid J. TS, XL, or XX, D& C;Eosin Y disodium salt;红色第 22 号, 四溴荧光黄, 曙红 Y, 曙红微黄, 酸性红 87,水溶性伊红;2′,4′,5′,7′-Tetrabromofluorescein disodium salt, Acid Red 87, Bromo acid J. TS, XL, or XX, Bromofluorescein, Bronze Bromo ES, D&C;Red No. 22, Eosin yellowish

CAS号 17372-87-1 经验分子式(希尔表示法) C20H6Br4Na2O5 分子量 691.85 MDL number MFCD00005040 EC Index Number 241-409-6
制造商品牌: 西格玛 Sigma-Aldrich
货号(SKU): 1.15935
CAS号: 17372-87-1
MDL号: MFCD00005040
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General description

Eosin Y (C.I. 45380) is a CERTISTAIN dry dye for microscopy that is often used as a counterstain, vizualising proteins, connective tissues, fibers and keratin in sample material of human origin. Depending on user requirements and personal preferences, it can be used for the preparation of the commonly used aqueous or alcoholic Eosin Y staining solutions. This staining solution will mostly be used for routine staining in the hematoxylin-eosin staining process (H&E). The H&E staining process is the most frequently used staining method for histological material. Due to the hematoxylin solution, the nuclei will appear blue to dark violet in color and the Eosin Y solution will stain the cytoplasma and intercellular substances red-orange.
As the Eosin Y dye belongs to the portfolio of Certistain dyes, it is chemically analyzed according to strict specifications before release (CE marked and IVD product) and a high staining quality, with reliable staining results is guaranteed.

Analysis Note

Dye content (gravimetrically): ≥ 85 %
Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ max (water): 515 - 518 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.005 g/l; water): 1200 - 1400
TLC-Test: passes test
Loss on drying (110 °C): ≤ 8 %
Suitability for microscopy: passes test


CERTISTAIN is a registered trademark of Merck KGaA, Darmstadt, Germany


Quality Level400
potency>2000 mg/kg LD50, oral (Rat)
compositionDye, ≥85% spectrophotometric assay
application(s)hematology: suitable
histology: suitable
pH9.2 (20 °C, 10 g/L in H2O)
mp295-296 °C
solubility300 g/L
bulk density710 kg/m3
εmax1200-1400 at 515-518 nm in water at 0.005 g/L
Featured IndustryDiagnostic Assay Manufacturing
storage conditionsStore at +5°C to +30°C.


风险声明 (欧洲) 36
安全声明 (欧洲) 22-26
储存温度 Storage temp.常温阴凉避光
全球实时库存 Availability √美国St. Louis ≥ 190 | 欧洲Eur. ≥ 66 | 東京Tokyo ≥ 82 | 香港与北京 ≥ 55