Molecular formula
C20H6Br2N2Na2O9

SMILES
C1=CC=C(C(=C1)C2=C3C=C(C(=O)C(=C3OC4=C(C(=C(C=C24)[N+](=O)[O-])[O-])Br)Br)[N+](=O)[O-])C(=O)[O-].[Na+].[Na+]

Safety labels

Fragrance
Odorless	60.71%
Sweet	32.28%
Musk	26.81%
Powdery	25.93%
Fatty	25.44%
Grape	22.98%
Dry	22.21%
Fruity	22.0%
Bitter	21.49%
Milky	21.1%

 

Flavor
Bitter	90.2%
Odorless	43.95%
Bland	22.96%
Nitrile	19.68%
Sweet-like	19.54%
Very strong	18.45%
Mild	18.31%
Indole	18.1%
Bread crust	17.92%
Cedarleaf	17.87%

 

Odor impact est.
Low

pKa est.
3.19 (weak acid)

Molecular weight
624.1 g/mol

Flash point

• 258.19 ˚C est.

• Eosin bluish
• Eosin B (C.I. 45400)
• MFCD00005041
• DTXSID80889350
• Eosin Scarlet
• Sodium 2-(4,5-dibromo-2,7-dinitro-6-oxido-3-oxo-3H-xanthen-9-yl)benzoate
• Eosin B, high purity biological stain
• Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, sodium salt (1:2)
• AcidRed91
• Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, sodium salt (1:2)
• Eosin B sodium salt
• CHEMBL63384
• SCHEMBL574805
• GYYTYUGGVBYJHE-UHFFFAOYSA-L
• DTXCID901028612
• AKOS015903023
• AKOS024319603
• E0204
• D90460
• Synonyms4',5'-Dibromo-2',7'-dinitrofluorescein disodium salt
• Eosin B, certified by the Biological Stain Commission, Dye content 90 %
• Eosin B, for microscopy (Fl., Hist.), adsorption and fluorescent indicator
• disodium 4,5-dibromo-9-(2-carboxylatophenyl)-2,7-dinitro-3,6-dioxo-8aH-xanthen-8a-ide

Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, sodium salt (1:2) is a xanthenic dye in the sodium salt form, commonly used as a dye/pigment precursor for coatings, inks, and plastics, benefiting from water dispersibility and bright coloration. It also serves as an intermediate in the synthesis of other xanthenic dyes and related chromophores for analytical and research applications. In practical settings, it may be used in textile dyeing (colorfast coloration), coatings and inks, and polymer materials, and is evaluated for fluorescent sensing or imaging reagents in laboratory studies. Its use is subject to local regulations and formulation limits.

gpt-5-nano

Solvent	Solubility (g/L)
ethanol	0.99
methanol	0.89
isopropanol	0.52
water	0.0
ethyl acetate	1.97
n-propanol	0.96
acetone	1.72
n-butanol	0.52
acetonitrile	0.84
DMF	15.37
toluene	0.8
isobutanol	0.58
1,4-dioxane	4.11
methyl acetate	3.51
THF	10.03
2-butanone	3.22
n-pentanol	0.47
sec-butanol	0.77
n-hexane	0.03
ethylene glycol	1.21
NMP	27.8
cyclohexane	0.04
DMSO	5.29
n-butyl acetate	1.74
n-octanol	0.31
chloroform	1.2
n-propyl acetate	1.8
acetic acid	2.67
dichloromethane	1.64
cyclohexanone	3.53
propylene glycol	1.28
isopropyl acetate	1.34
DMAc	21.62
2-ethoxyethanol	3.31
isopentanol	0.41
n-heptane	0.05
ethyl formate	1.39
1,2-dichloroethane	1.14
n-hexanol	0.45
2-methoxyethanol	5.92
isobutyl acetate	0.79
tetrachloromethane	0.11
n-pentyl acetate	1.42
transcutol	6.82
n-heptanol	0.42
ethylbenzene	0.31
MIBK	0.87
2-propoxyethanol	4.64
tert-butanol	0.45
MTBE	0.82
2-butoxyethanol	2.49
propionic acid	2.61
o-xylene	0.54
formic acid	2.46
diethyl ether	0.96
m-xylene	0.39
p-xylene	0.33
chlorobenzene	0.39
dimethyl carbonate	3.73
n-octane	0.02
formamide	4.4
cyclopentanone	7.47
2-pentanone	1.66
anisole	1.36
cyclopentyl methyl ether	2.87
gamma-butyrolactone	11.53
1-methoxy-2-propanol	4.71
pyridine	4.85
3-pentanone	1.88
furfural	8.49
n-dodecane	0.02
diethylene glycol	4.08
diisopropyl ether	0.24
tert-amyl alcohol	0.76
acetylacetone	3.02
n-hexadecane	0.03
acetophenone	2.27
methyl propionate	4.02
isopentyl acetate	1.24
trichloroethylene	2.9
n-nonanol	0.38
cyclohexanol	0.74
benzyl alcohol	1.47
2-ethylhexanol	0.41
isooctanol	0.35
dipropyl ether	1.07
1,2-dichlorobenzene	0.41
ethyl lactate	2.12
propylene carbonate	3.61
n-methylformamide	5.79
2-pentanol	0.4
n-pentane	0.03
1-propoxy-2-propanol	3.53
1-methoxy-2-propyl acetate	4.71
2-(2-methoxypropoxy) propanol	3.59
mesitylene	0.18
ε-caprolactone	5.12
p-cymene	0.31
epichlorohydrin	8.69
1,1,1-trichloroethane	0.46
2-aminoethanol	1.64
morpholine-4-carbaldehyde	20.17
sulfolane	15.39
2,2,4-trimethylpentane	0.03
2-methyltetrahydrofuran	3.87
n-hexyl acetate	1.24
isooctane	0.01
2-(2-butoxyethoxy)ethanol	3.38
sec-butyl acetate	1.16
tert-butyl acetate	1.48
decalin	0.03
glycerin	3.2
diglyme	6.87
acrylic acid	3.71
isopropyl myristate	0.59
n-butyric acid	1.5
acetyl acetate	1.31
di(2-ethylhexyl) phthalate	0.9
ethyl propionate	1.98
nitromethane	6.59
1,2-diethoxyethane	2.21
benzonitrile	0.98
trioctyl phosphate	0.51
1-bromopropane	0.59
gamma-valerolactone	14.29
n-decanol	0.29
triethyl phosphate	1.16
4-methyl-2-pentanol	0.23
propionitrile	1.07
vinylene carbonate	3.49
1,1,2-trichlorotrifluoroethane	10.22
DMS	3.38
cumene	0.2
2-octanol	0.28
2-hexanone	1.47
octyl acetate	0.86
limonene	0.48
1,2-dimethoxyethane	5.08
ethyl orthosilicate	0.97
tributyl phosphate	0.57
diacetone alcohol	2.68
N,N-dimethylaniline	1.21
acrylonitrile	2.22
aniline	1.47
1,3-propanediol	1.53
bromobenzene	0.32
dibromomethane	0.78
1,1,2,2-tetrachloroethane	2.22
2-methyl-cyclohexyl acetate	1.56
tetrabutyl urea	1.22
diisobutyl methanol	0.25
2-phenylethanol	1.46
styrene	0.38
dioctyl adipate	1.28
dimethyl sulfate	7.66
ethyl butyrate	1.69
methyl lactate	4.61
butyl lactate	1.87
diethyl carbonate	1.2
propanediol butyl ether	1.85
triethyl orthoformate	1.63
p-tert-butyltoluene	0.31
methyl 4-tert-butylbenzoate	2.68
morpholine	6.84
tert-butylamine	0.22
n-dodecanol	0.22
dimethoxymethane	6.91
ethylene carbonate	2.26
cyrene	5.96
2-ethoxyethyl acetate	3.65
2-ethylhexyl acetate	1.13
1,2,4-trichlorobenzene	0.93
4-methylpyridine	3.1
dibutyl ether	0.53
2,6-dimethyl-4-heptanol	0.25
DEF	5.05
dimethyl isosorbide	7.72
tetrachloroethylene	1.25
eugenol	2.83
triacetin	3.35
span 80	2.43
1,4-butanediol	0.67
1,1-dichloroethane	0.65
2-methyl-1-pentanol	0.44
methyl formate	4.15
2-methyl-1-butanol	0.6
n-decane	0.03
butyronitrile	0.62
3,7-dimethyl-1-octanol	0.32
1-chlorooctane	0.15
1-chlorotetradecane	0.08
n-nonane	0.03
undecane	0.03
tert-butylcyclohexane	0.03
cyclooctane	0.02
cyclopentanol	1.42
tetrahydropyran	2.04
tert-amyl methyl ether	1.11
2,5,8-trioxanonane	5.21
1-hexene	0.15
2-isopropoxyethanol	2.16
2,2,2-trifluoroethanol	1.7
methyl butyrate	2.26

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