General Information
Product Name |
Fluorescein |
CAS Number |
2321-07-5 |
Molecular Formula |
C20H12O5 |
Molecular Weight |
332.31 |
MDL Number |
MFCD00005050 |
EC Number |
219-031-8 |
Synonym |
3′,6′-Dihydroxyspiro[isobenzofuran-1(3H),9′-[9H]xanthen]-3-one, 9-(o-carboxyphenyl)-6-hydroxy-3H-xanthen-3-one; 3′,6′-dihydroxyfluoran, 3′,6′-fluorandiol; 9-(o-carboxyphenyl)-6-hydroxy-3-isoxanthenone, resorcinolphthalein, D & C Yellow no. 7, C.I. Solvent Yellow 94 , C.I. 45350:1, C20H12O5, CAS 2321-07-5
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Specification
Grade |
Indicators
|
Solubility In EtOH | passes test |
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Loss On Drying | ≤5% |
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Sulfated Ash | ≤0.3% |
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Lambda Max. | 490-493 nm λ(pH8.0) |
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Mass Absorptivity | ≥115 L/(cm·g) λ(pH8.0) |
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Sensitivity Test | passes test |
References
Colour Index Number |
45350 |
Merck Index(14) |
4159 |
RTECS# |
LM5075000 |
Packaging Information
Packaging |
25kg in carton drum (32cm*58cm) 1kg in foil bag (10cm*15cm) |
GHS
Pictogram: |

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Signal Word: |
Warning |
Hazard Statements: |
H319: Causes serious eye irritation. |
Precautionary Statements: |
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do – continue rinsing. |
Transport Information
UN Number: |
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Class: |
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Packing Group |
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HS Number |
3204.90.0000 |