C28H31ClN2O3
479 g/mol
Dye & PigmentDanger
RHODAMINE B
CAS81-88-9EC201-383-9
Category
Dye & Pigment
Compound Class
Amine
Primary Use
Dye for paper and textiles
Rhodamine B is a red dye used primarily for coloring paper and textiles, as well as a biological stain and reagent in analytical chemistry. The FDA has classified D&C Red No.
Dye for paperDye for textiles (wool and silk)Reagent for analytical chemistry
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
Relevant lists:California Proposition 65
CAS 81-88-9
Related Compounds
StrongSame Parent
Pigment Violet 1
CAS1326-03-0
purple pigment for coloring
SimilarStructure SimilarSimilarity 0.82
Xanthylium, 3,6-bis(diethylamino)-9-[2-(methoxycarbonyl)phenyl]-, chloride (1:1)
CAS39393-39-0
Fluorescent dye
SimilarStructure SimilarSimilarity 0.82
Basic violet 11:1
CAS73398-89-7
Fluorescent solvent dye
SimilarStructure SimilarSimilarity 0.80
Basic Violet 11
CAS2390-63-8
Basic violet pigment
ReferenceSame Category
3-Bromobenzanthrone
CAS81-96-9
dye intermediate
ReferenceSame Category
1-Nitroanthraquinone
CAS82-34-8
intermediate for anthraquinone dyes
ReferenceSame Category
1,8-Dichloroanthraquinone
CAS82-43-9
intermediate for anthraquinone dyes
ReferenceSame Category
1-chloroanthraquinone
CAS82-44-0
Chemical intermediate for dyes
Safety Reference
Danger
H302Harmful if swallowed
H318Causes serious eye damage
H412Harmful to aquatic life with long lasting effects
H335May cause respiratory irritation
Regulatory Compliance1
- California Proposition 65USRegulation
Customs Tariff Classification
The international HS code for RHODAMINE B (CAS 81-88-9) is 3204.13.
HS code (international, 6-digit)
3204.13
EU CN code (8-digit)
3204 13 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
[9-(2-carboxyphenyl)-6-(diethylamino)xanthen-3-ylidene]-diethylazanium chloride
InChIKey
PYWVYCXTNDRMGF-UHFFFAOYSA-N
SMILES
CCN(CC)C1=CC2=C(C=C1)C(=C3C=CC(=[N+](CC)CC)C=C3O2)C4=CC=CC=C4C(=O)O.[Cl-]
Synonyms (102)
- 11411 Red
- ADC Rhodamine B
- Acid Brilliant Pink B
- Aizen Rhodamine BH
- Aizen Rhodamine BHC
- Akiriku Rhodamine B
- Basazol Red 71P
- Basic Rose Red
- Basic Violet 10
- Basic Violet 10 solution
- Basonyl Red 540
- Basonyl Red 545
- Basonyl Red 545FL
- Brilliant Pink B
- C.I. Basic Violet 10
- C.I. No. 45170
- CI Food Red 15
- Calcozine Red BX
- Calcozine Rhodamine BL
- Calcozine Rhodamine BX
- Calcozine Rhodamine BXP
- Cerise Toner X1127
- Certiqual Rhodamine
- Cogilor Red 321.10
- D and C Red No. 19
- D&C RED NO. 19 (DELISTED)
- D&C Red 19
- D&C red no.19
- Diabasic Rhodamine B
- Edicol Suppa Rose BS
- Edicol Supra Rose B
- Edicol Supra Rose BS
- Elcozine Rhodamine B
- Eriosin Rhodamine B
- FD and C Red No. 19
- FD&C RED NO. 19 (DELISTED)
- FD&C Red No. 19
- Food Red 15
- Geranium lake N
- Hexacol Rhodamine B Extra
- Ikada Rhodamine B
- Iragen Red L-U
- Mitsui Rhodamine BX
- RHODAMINE B
- ROSE B W 3005
- Red No. 213
- Rheonine B
- Rhodamine
- Rhodamine B (C.I. 45170)
- Rhodamine B 20-7470
- Rhodamine B Extra
- Rhodamine B Extra M 310
- Rhodamine B Extra S
- Rhodamine B chloride
- Rhodamine B500
- Rhodamine B500 hydrochloride
- Rhodamine BA
- Rhodamine BA Export
- Rhodamine BF
- Rhodamine BL
- Rhodamine BN
- Rhodamine BS
- Rhodamine BX
- Rhodamine BXL
- Rhodamine BXP
- Rhodamine FB
- Rhodamine FB CL
- Rhodamine Lake Red B
- Rhodamine O
- Rhodamine S
- Rhodamine S [Russian]
- Rhodamine b monocation
- Rhodamine, Blue shade
- Rhodamine, tetraethyl-
- Rodamina B
- Sicilian Cerise Toner A-7127
- Symulex Magenta F
- Symulex Pink F
- Symulex Rhodamine B Toner F
- Takaoka Rhodamine B
- Tetraethylrhodamine
- Violet zasadita 10
- Violet zasadita 10 [Czech]