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478-43-3

Basic Information
CAS No.: 478-43-3
Name: Rhein
Article Data: 48
Molecular Structure:
Molecular Structure of 478-43-3 (Rhein)
Formula: C15H8O6
Molecular Weight: 284.225
Synonyms: Monorhein;4,5-DiOH-anthraquinone-2-COOH;Chrysazin-3-carboxylic acid;Rhein (1,8-dihydroxy-3-carboxyl anthraquinone);4, 5-Dihydroxyanthraquinone-2-carboxylic acid;Rheic acid;9,10-Dihydro-4,5-dihydroxy-9,10-dioxo-2-anthracene carboxylic acid;Rhubarb Yellow;1.8-Dihydroxy-3-Carboxy anthraquinone;4-10-00-04088 (Beilstein Handbook Reference);2-Anthroic acid, 9,10-dihydro-4,5-dihydroxy-9,10-dioxo- (8CI);4,5-dihydroxy-9,10-dioxo-anthracene-2-carboxylate;Cassic acid;2-Anthroic acid, 9,10-dihydro-4,5-dihydroxy-9,10-dioxo-;2-Anthracenecarboxylic acid, 9,10-dihydro-4,5-dihydroxy-9,10-dioxo-;1,8-Dihydroxyanthraquinone-3-carboxylic acid;9,10-Dihydro-4,5-dihydroxy-9,10-dioxo-2-anthracenecarboxylic acid;4,5-Dihydroxy-2-anthraquinonecarboxylic acid;
EINECS: 207-521-4
Density: 1.687 g/cm3
Melting Point: ≥300 °C(lit.)
Boiling Point: 597.8 °C at 760 mmHg
Flash Point: 329.4 °C
Solubility: <0.1 g/100 mL at 17 °C in water
Appearance: Yellowish brown solid
Hazard Symbols: IrritantXi
Risk Codes: 36/37/38
Safety: 26-37/39
PSA: 111.90000
LogP: 1.57140
Synthetic route
13739-02-1

diacetylrhein

478-43-3

1,8-dihydroxy-3-carboxy-anthraquinone

Conditions
ConditionsYield
With sodium carbonate In water100%
Stage #1: diacetylrhein With water; sodium carbonate
Stage #2: With hydrogenchloride In water pH=2;
100%
With sodium hydroxide In water for 0.5h;60%
481-74-3

Chrysophanol

478-43-3

1,8-dihydroxy-3-carboxy-anthraquinone

Conditions
ConditionsYield
Stage #1: Chrysophanol With chromium(VI) oxide In acetic anhydride; acetic acid at 65℃; for 8h;
Stage #2: With sodium carbonate In water
98%
Stage #1: Chrysophanol With pyridine at 20℃;
Stage #2: With chromium(VI) oxide; acetic anhydride; acetic acid In water at 45 - 65℃; for 8h;
98%
6155-37-9

Rhein methyl ester

478-43-3

1,8-dihydroxy-3-carboxy-anthraquinone

Conditions
ConditionsYield
With sodium hydroxide In tetrahydrofuran for 0.5h;96%
481-72-1

1,8-dihydroxy-3-hydroxymethyl-9,10-anthracenedione

478-43-3

1,8-dihydroxy-3-carboxy-anthraquinone

Conditions
ConditionsYield
With oxygen at 120℃; for 14h; Green chemistry;93%
With sulfuric acid; sodium nitrite at 120℃; for 3h;85%
With water; pyridinium chlorochromate In N,N-dimethyl-formamide at 20℃; for 24h;62%
1019637-61-6

4-(2-methoxybenzoyl)-5-methoxybenzene-1,3-dicarboxylic acid

478-43-3

1,8-dihydroxy-3-carboxy-anthraquinone

Conditions
ConditionsYield
at 155 - 160℃; for 14h; Inert atmosphere;92%
1402610-53-0

rhein potassium

478-43-3

1,8-dihydroxy-3-carboxy-anthraquinone

Conditions
ConditionsYield
With sulfuric acid In water pH=4.5 - 5;87%
109650-18-2

Ethyl 9,10-dihydro-4,5-dihydroxy-9,10-dioxo-2-anthracenecarboxylate

478-43-3

1,8-dihydroxy-3-carboxy-anthraquinone

Conditions
ConditionsYield
With sodium hydroxide for 24h; Ambient temperature;85%

C21H21OO4N

478-43-3

1,8-dihydroxy-3-carboxy-anthraquinone

Conditions
ConditionsYield
With hydrogenchloride at 120℃; for 120h;74%
72049-24-2

3-carboxy-1,8-dimethoxyanthracene-9,10-dione

478-43-3

1,8-dihydroxy-3-carboxy-anthraquinone

Conditions
ConditionsYield
With hydrogen bromide In toluene for 10h; Reflux;56%
820243-51-4

5-hydroxy-4-(2-hydroxybenzoyl)isophthalic acid

478-43-3

1,8-dihydroxy-3-carboxy-anthraquinone

Conditions
ConditionsYield
With aluminium trichloride; sodium chloride at 150℃; for 2h;50%
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  • chrysazin-3-carboxylicacidCAS NO.: 478-43-3

  • Casno:

    478-43-3

    chrysazin-3-carboxylicacidCAS NO.: 478-43-3

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  • Rhein

  • Casno:

    478-43-3

    Rhein

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    Rhein Basic information Product Name: Rhein Synonyms: chrysazin-3-carboxylicacid;monorhein;rheicacid;RHUBARB EXTRACT;RHUBARB YELLOW;RHEIN;TIMTEC-BB SBB001152;1,8-DIHYDROXY-9,10-ANTHRAQUINONE-3-CARBOXYLIC ACID CAS: 478-43-3 MF: C15H8O6 MW

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    478-43-3

    Rhein

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    Founded in 2008, East Chemsources Limited is a professional manufacturer of supplier in food and beverage, pharmaceuticals, cosmetics and other industries. pharmaceutical field in

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    Rhein

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    Rhein

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    478-43-3

    High purity Rhein

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  • Rhein

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    478-43-3

    Rhein

    Min.Order: 1 Metric Ton

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Chemistry

IUPAC Name:4,5-dihydroxy-9,10-dioxoanthracene-2-carboxylic acid
Molecular Formula:C15H8O6
Molecular Weight:284.220420 g/mol
Melting Point:≥300 °C(lit.)
storage temp.:2-8°C
Water Solubility:<0.1 g/100 mL at 17°C
Merck:13,8260
CAS DataBase Reference:478-43-3(CAS DataBase Reference)
EPA Substance Registry System:478-43-3(EPA Substance)
Synonyms of RHUBARB YELLOW(478-43-3):
9,10-dihydro-4,5-dihydroxy-9,10-dioxo-2-anthracenecarboxylicaci;9,10-dihydro-4,5-dihydroxy-9,10-dioxo-2-anthroicaci;chrysazin-3-carboxylicacid;monorhein;rheicacid;RHUBARBEXTRACT;RHUBARB YELLOW;RHEIN
Categories of RHUBARB YELLOW(478-43-3):
Anthraquinones, Hydroquinones and Quinones;Aromatics Compounds;Improve Organism Immunity;The group of Polydatin;Aromatics;Heterocycles;Intermediates & Fine Chemicals;Pharmaceuticals;Isotope Labeled Compounds

Uses

RHUBARB YELLOW(478-43-3) is used as a pharmaceutical intermediate and  health food ingredient.

Toxicity Data With Reference

1.   

orl-mus LD50:>5 g/kg

   PHTOEH    Pharmacology and Toxicology (Copenhagen). 61 (1987),153.
2.   

ivn-mus LD50:>25 mg/kg

   PHTOEH    Pharmacology and Toxicology (Copenhagen). 61 (1987),153.

Safety Profile

Safety Information of RHUBARB YELLOW(478-43-3):
Hazard Codes:Xi 
Risk Statements:36/37/38
36/37/38:Irritating to eyes, respiratory system and skin 
Safety Statements:26-37/39
26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
37/39:Wear suitable gloves and eye/face protection   
WGK Germany:2
RTECS:CA9516000
A poison by intravenous route. Low toxicity by ingestion. When heated to decomposition it emits acrid smoke and irritating vapors.
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