C.A.S. No. : 3952-78-1
M.F. : C19H15NO8
M.W. : 412.36gm/mole
Specifications:
Solubility in 0.1% (0.1N NaOH) Clear solution
Absorption Max (0.1N NaOH) max 564-568nm
Absorptivity (A1%,1cm, in 50% Ethanol) >250
Loss On Drying (110C) <10%
Product : Aurin
C.A.S No. : 603-45-2
C.I.No. : 43800
M.F : C19H14O3
M.W. : 290.32gm/mole
Specifications:
Dye Content (by Spectrophotometry): >85%
Solubility 0.1% (EtOH): Clear solution
Absorption maximum (Ethanol +5ml 1N HCl)? max: 482-487nm
Absorptivity (A1%/1cm, in Ethanol + 5ml 1N HCl at max): >2000
Loss On Drying (110C): <3%
Product : Azure A
C.A.S. No. : 531-53-3
C.I. No. : 52005
M.F. : C14H14CIN3S
M.W. : 291.80gm/mole
Specifications:
Dye Content (by Spectrophotometry) = >75%
Solubility 0.1% (Dist. Water) = Clear solution
Absorption Maximum (Dist. Water)? max = 628-633nm
Absorptivity (A1%, 1cm in Water, at max on dried substance) = >1120
Loss On Drying (110C) = <8%
Suitability for microscopy = Passes test
Product : Brilliant Cresyl Blue 65%
C.A.S. No. : 81029-05-2
M.F. : C17H20CIN3O.1/2.ZnCl2
M.W. : 385.96gm/mole
Specifications:
Dye Content (by Spectrophotometry) >65%
Solubility 0.1% (50% EtOH) Clear blue solution
Absorption Maximum (in 50% EtOH) ?max 625-630nm
Absorptivity (A1%/1cm,in 50% EtOH at max) >1600
Loss On Drying (110C) <8%
Suitability for microscopy Passes test
Product : Bromophenol Blue
C.A.S. No. :115-39-9
M.F. :C19H10Br4O5S
M.W. :669.99gm/mole
Specifications:
Dye Content (by Spectrophotometry) >95%
Transition Range pH 3.0-4.6
Greenish Yellow-Blue
Solubility 0.1% (95% EtOH) Clear solution
Absorption maximum (pH 3.0) ?1max 434-439nm
Absorption maximum (pH 4.6) ?2max 590-593nm
Absorptivity (A1%/1cm at pH 3.0 at ?1max) 350-385
Absorptivity (A1%/1cm at pH 4.6 at ?2max) 940-1000
Loss On Drying (110�°C) <1%
Product Description:
Bromophenol blue is an acid-base indicator since its useful range lies between pH 3.0 and 4.6. It changes from yellow at pH 3.0 to blue at pH 4.6; this reaction is reversible. Bromophenol blue is structurally related to phenolphthalein (a popular indicator). Bromophenol blue is also used as a color marker to monitor the process of agarose gel electrophoresis and polyacrylamide gel electrophoresis.
Product : Bromothymol Blue
C.A.S. No. :76-59-5
M.F. : C27H28Br2O5S
M.W. : 624.40gm/mole
Specifications:
Dye Content (by Spectrophotometry) >95%
Transition Range pH 5.8-7.6
Yellow-Blue
Solubility 0.1% (95% EtOH) Clear solution
Absorption maximum (pH 5.8) 1max 430-435nm
Absorption maximum (pH 7.6) 2max 615-618nm
Absorptivity (A1%/1cm at pH 5.8 at 1max) 260-300
Absorptivity (A1%/1cm at pH 7.6 at 2max) 470-520
Loss On Drying (110C) <3%
Product Description:
Bromothymol blue is a large compound with a molecular weight of 625 g/mol. It contains three aromatic benzene rings. The first benzene ring has a thym group attached (the 'thym' part of the name), a sulfur with two oxygen atoms double bonded to it, and another oxygen single bonded to it. The second and third benzene rings each have a bromine (the 'bromo' part of the name), alcohol (the 'ol' suffix), a tert-butyl group, and a methyl group. This 0.1% aqueous bromothymol blue solution (also known as Bromthymol Blue) is a commonly used pH indicator. Bromthymol blue changes color over a pH range from 6.0 (yellow) to 7.6 (blue). It is a good indicator of dissolved carbon dioxide (CO2) and other weakly acidic solutions. Despite its name, bromothymol blue solution may sometimes appear yellow or reddish depending on the pH of the stock water used to prepare this pH indicator solution. Low levels of carbon dioxide or acid in solution with bromothymol blue indicator will appear blue. As the level of carbon dioxide or acid increases, the solution will gradually take on a yellow tint. This makes bromothymol blue ideal for biology experiments to indicate photosynthetic activity (solution turns blue as plants use up carbon dioxide) or respiratory activity (solution turns yellow as carbon dioxide content increases).
Product : O- Cresolphthalein Complexone
C.A.S. No. :2411-89-4
M.F. :C32H32N2 O12
M.W. :636.62gm/mole
Specifications:
Solubility 0.1% (0.1N NaOH) = Clear solution
Absorption maximum (0.1N NaOH) at ?max = 572-578nm
Absorptivity (A1%1cm in 0.1N NaOH, at ?max on dried substance) = >790
Loss On Drying (110�°C) = <6%
Product Description:
o-Cresolphthalein Complexone is complexometric reagent derived from o-Cresolphthalein. It shows violet-red color in alkaline media and is a principle compound for the determination of hardness of water.Also used as Calcium Assay Kit as direct colorimetric assay based on the O-Cresolphtalein (OCPC) method without deproteinization of the sample. The calcium determination is based on the reaction of calcium with O-Cresolphthalein complexone in alkaline solution, which yields a violet colored complex. The intensity of the color formed is proportional to the calcium concentration in the sample. Absorbance of the Ca2+-O-Cresolphtalein complex is measured at 570nm. Wavelength range of sensitivity: 560 ~ 590nm.
Product: Fluorescein Complexone
CAS No.: 1461-15-0
Formula : C30H26N2O13
Molecular weight : 622.55 g/mol
Specification:
Solubility 0.1% (0.1N NaOH): Clear solution
Absorption maximum (0.1N NaOH) ?max: 499+/-5nm
Absorptivity (A1%/1cm at ?max): >800
Loss On Drying (110C): <8%
Product : Azure B
C.A.S. No. : 531-55-5
CI NO. : 52010
M.F. : C15H16CIN3S
M.W. : 305.83gm/mole
Specifications:
Dye Content (by Spectrophotometry) 80%
Solubility 0.1% (Dist. Water) Clear solution
Absorption Maximum (Dist. Water) ?max 645-650nm
Absorptivity (A1%/1cm,in water at ?max on dried substance) >1600
Loss On Drying (110C) <5%
Suitability for microscopy Passes test.
Product Description:
Azure B is a cationic dye. It is part of the Romanowsky stain, which is used for the staining of blood films. It is also used for the localization of nucleic acids. Azure B has been used for the staining of chromosomes. Azure B has been used in M'Fadyean stain to visualize Bacillus anthracis capsule.
Product : Bromocresol Purple
C.A.S. No. : 115-40-2
M.F. : C21H16Br2O5S
M.W. : 540.24gm/mole
Specifications:
Dye Content (by Spectrophotometry) >95%
Transition Range pH 5.2-6.8
Yellow-Purple
Solubility 0.1% (95% EtOH) Clear solution
Absorption maximum (pH 5.2) ?1max 427-431nm
Absorption maximum (pH 6.8) ?2max 588-590nm
Absorptivity (A1%/1cm at pH 5.2 at ?1max) 400-500
Absorptivity (A1%/1cm at pH 6.8 at ?2max) 1000-1100
Loss On Drying (110�°C) <1%
Product Description:
Bromocresol Purple is a water-soluble dye used as a protein probe. It has been used in the spectrophotometric determination of serum-albumin. It is also a pH indicator with a transition interval from 5.2 - 6.8 (yellow to purple).
Product: Cresol Red
C.A.S. No. : 1733-12-6
M.F : C21H18O5S
M.W. ; 382.43gm/mole.
Specifications:
Dye Content (by Spectrophotometry) = >95%
Transition Range = pH 6.5-8.8 ,Yellow-Purple
Solubility 0.1% (95% EtOH) = Clear solution
Absorption maximum (pH 6.5) ?1max = 432-436nm
Absorption maximum (pH 8.8) ?2max = 571-574nm
Absorptivity (A1%/1cm at pH 6.5 at ?1max) = 490-540
Absorptivity (A1%/1cm at pH 8.8 at ?2max) = 1000-1100
Loss On Drying (110�°C) = <3%
Product Description:
Cresol red (full name: o-cresolsulfonephthalein) is a dye C21H18O5S of the sulfone phthalein series derived from ortho-cresol that is obtained as a reddish brown crystalline powder and is used as an acid-base indicator. It is a triarylmethane dye frequently used for monitoring the pH in aquaria.
Product : Bromocrersol Green
C.A.S. No. : 76-60-8
M.F. C : 21H14Br4O5S
M.W. : 698.04gm/mole
Specifications:
Dye Content (by Spectrophotometry) >95%
Transition Range pH 3.8-5.4
Greenish Yellow-Blue
Solubility 0.1% (95% EtOH) Clear solution
Absorption maximum (pH 3.8) 1max 438-443nm
Absorption maximum (pH 5.4) 2max 615-618nm
Absorptivity (A1%/1cm at pH 3.8 at ?1max) 240-270
Absorptivity (A1%/1cm at pH 5.4 at 2max) 530-570
Loss On Drying (110�°C) <3%
Product Description
Bromocresol Green is a dye of the triphenylmethane family (triarylmethane dyes). It binds quantitatively with human albumin forming an intense blue-green complex with an absorbance maximum at 628 nm.
Format Powder
pH 3.8 - 5.4, yellow to blue.
Product : Chromotrope 2R
C.A.S. No. : 4197073
CI NO. : 16570
M.F. : C16H10N2Na2O8S2
M.W. : 468.37gm/mole
Specifications:
Dye Content (by Spectrophotometry) = >75%
Solubility 0.1 % (MeOH) = Clear solution
Absorption maximum (MeOH) max = 510+/-4nm
Absorptivity (A1%1cm in MeOH at max) = >485
Loss On Drying (110C) = <10%
Product: Eosin Blue
C.A.S. No.: 548-24-3
CI NO.: 45400
M.F.: C20H6Br2N2Na2O9
M.W.: 624.09gm/mole
Specifications:
Dye content (By Gravimetry) = >85%
Solubility 0.1 % (Dist. Water) = Clear solution
Absorption maximum (Dist. water) ?max = 516-520nm
Absorptivity (A1%1cm in water at ?max) = >800
Loss On Drying (110�°C) = <8%
Product Description:
Eosin B sodium salt is a cell and tissue stain. Eosin B sodium salt is used as a counter stain for collagen, as a tissue stain for cell granules, nuclei, and microorganisms when coupled with Azure A (sc-203729), and as a stain for cell differentiation of the anterior pituitary.
Product: Giemsa's Stain
C.A.S. No.: 51811-82-6
Specifications:
Solubility 0.1 % (MeOH) = Clear solution
Absorption Maximum(in MeOH) ?1max = 640-650 nm
Absorption Maximum(in MeOH) ?2max = 520 - 525 nm
Absorptivity (A1%1cm in MeOH at ?1max on dried substance) = 950-1150
Absorptivity (A1%1cm in MeOH at ?2max on dried substance) = 600-750
Loss On Drying (110�°C) = <10%
Suitability for microscopy = Passes test.
Product Description:
Giemsa Stain is a laboratory reagent and stain for microscopy. A compound of eosin with methylene blue and its oxidation products. When blood films are stained using Giemsa stain, the nucleus and cytoplasm of white blood cells take on a characteristic blue or pink coloration. Giemsa stain functions by rearranging chromatin and inducing G bands producing a high quality stain for chromatin and the nuclear membrane. Giemsa stain is used to differentiate nuclear and/or cytoplasmic morphology of platelets, RBCs, WBCs, and parasites (1,2). The most dependable stain for blood parasites, particularly in thick films, is Giemsa stain containing azure B. Liquid stock is available commercially. The stain must be diluted for use with water buffered to pH 6.8 or 7.0 to 7.2, depending on the specific technique used.
Product: Leishman's Stain
C.A.S. No.:12627-53-1
Specifications:
Solubility 0.1 % (MeOH) = Clear solution
Absorption Maximum (in MeOH) ?1max = 640-645nm
Absorption Maximum (in MeOH) ?2max = 522-525nm
Absorptivity (A1%1cm in MeOH at ?1max on dried substance) = >900
Absorptivity (A1%1cm in MeOH at ?2max on dried substance) = >650
Loss On Drying (110�°C) = <8%
Suitability for microscopy = Passes test.
Product Description:
Leishman's stain is applied in conventional staining techniques to uniformly stain chromosomes. These techniques leave centromers constricted, thus enabling the measurement of chromosome length, centromeric position, and arm ratio. Slides can be easily destained and banded by most banding procedures.
Product: Evan's Blue
C.A.S. No.: 314-13-6
CI NO.: 23680
M.F.: C34H24N6Na4O14S4
M.W.: 960.82gm/mole
Specifications:
Dye Content (by Spectrophotometry) = >85%
Solubility 0.1 % (Dist. Water) = Clear solution
Absorption maximum (Dist. water) ?max = 605-611nm
Absorptivity (A1% 1cm in water, at ?max, on dried substance) = >800
Loss On Drying (110�°C) = <10%
Suitability for microscopy = Passes test.
Product : Orcein
C.A.S. No. :1400-62-0
Specifications:
Solubility 0.1 %(0.1N NaOH) = Clear solution
Absorption Maximum (0.1N NaOH) ?max = 574-580nm
Absorptivity (A1%/1cm in 0.1N NaOH, at ?max) = 250-450
Loss on drying (110�°C) = <7%
Product Description:
Once used as a food colouring but now banned throughout the EC Cudbear is a dye extracted from orchil lichens that produces colour's in the purple range. It can be used to dye wool and silk, without the use of mordant. Cudbear was the first dye to be invented in modern times, and one of the few dyes to be credited to a named individual. Orcinol is extracted from archil lichen, Rocella tinctoria. It is then converted to orcein by ammonia and air. Orcein is a reddish-brown dye, orchil is a purple-blue dye. aminoorceinimines.
Product : o - Cresolphthalein
C.A.S. No. :596-27-0
M.F. :C22H18O4
M.W. :346.38gm/mole
Specifications:
Dye Content (by Spectrophotometry) = >95%
Appearance = White-Off white powder
Solubility 0.1% (EtOH) = Clear solution
Transition Range = pH 8.2-9.8
Colorless-Red
Absorption maximum (0.1N NaOH) at ?max = 564-568nm
Absorptivity (A1%1cm in 0.1N NaOH at ?max) = >1670
Loss On Drying (110�°C) = <1%
Product Description:
Cresolphthalein is a pH indicator used in titrations. It is insoluble in water but soluble in ethanol.
Product: 2:6 Dichlorophenol Indophenol Sodium Salt
C.A.S. No.: 620-45-1
M.F. : C12H5Cl2NNaO22H2O
M.W.: 326.11gm/mole
Specifications:
Solubility 0.1% ((50% EtOH +2ml Na2CO3) = Clear solution
Absorption maximum (50% EtOH +2ml Na2CO3) ?max= 640-645nm
Absorptivity (A1%/1cm, in 50% EtOH +2ml Na2CO3), at ?max = >700
Interfering dyes test (according to ACS) = Passes test
Loss On Drying (110�°C) = <12%
Product Description:
2,6-dichlorophenolindophenol ( DCPIP ) is a blue chemical compound used as a redox dye. In Oxidized form DCPIP is blue;whereas in reduced form DCPIP is colorless.The rate of photosynthesis can be measured by the rate at which this dye changes color (is reduced) when exposed to light in a photosynthetic system. This reaction is reversible, as colorless DCPIP can be reoxidized to blue. Blue redox indicator dye used for the determination of Vitamin C (ascorbic acid), which when Vitamin C is present reduces to a colorless hydroxy compound. May be used as an electron acceptor and to stain glutathione reductase electrophoresis gels. Also known as Tillman's reagent.
