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91-56-5

91-56-5 structure
91-56-5 structure
  • Name: isatin
  • Chemical Name: isatin
  • CAS Number: 91-56-5
  • Molecular Formula: C8H5NO2
  • Molecular Weight: 147.131
  • Catalog: analytical chemistry Standard Spectrometric standard
  • Create Date: 2018-07-25 18:27:37
  • Modify Date: 2025-08-21 15:38:21
  • Isatin (Indoline-2,3-dione) is a potent inhibitor of monoamine oxidase (MAO) with an IC50 of 3 μM. Also binds to central benzodiazepine receptors (IC50 against clonazepam, 123 μM)[1]. Also acts as an antagonist of both atrial natriuretic peptide stimulated and nitric oxide-stimulated guanylate cyclase activity[2]. Shows effect on the serotonergic system[3].
Name isatin
Synonyms Indolequinone
EINECS 202-077-8
MFCD00005718
indole-2,3-dione
indoline-2,3-dione
Indoquinone
2,3-Dioxoindoline
2,3-Dioxo-2,3-dihydroindole
2,3-Indolinedione
2,3-INDOLEDIONE
2H-Indol-2-one, 3-hydroxy-
3-hydroxy-2-oxoindole
ISATIC ANHYDRIDE
Isotin
2,3-Diketoindoline
2-methopropan-1-ol
3-Hydroxy-2H-indol-2-one
Isatin
2,3-KETOINDOLINE
5-21-10-00221 (Beilstein Handbook Reference)
2,3-dihydro-1H-indol-2,3-dione
Description Isatin (Indoline-2,3-dione) is a potent inhibitor of monoamine oxidase (MAO) with an IC50 of 3 μM. Also binds to central benzodiazepine receptors (IC50 against clonazepam, 123 μM)[1]. Also acts as an antagonist of both atrial natriuretic peptide stimulated and nitric oxide-stimulated guanylate cyclase activity[2]. Shows effect on the serotonergic system[3].
Related Catalog
Target

IC50: 3 μM (MAO B)[1]

In Vitro In dopaminergic SH-SY5Y cells isatin (1-400 μM) induces cell death in dose- and time dependent manner. This death occurred as a continuum of survival, apoptosis and necrosis[2].
In Vivo A single dose of isatin (80 mg/kg) has a rapid effect on the serotonergic system in the hypothalamus. Isatin significantly increases 5-HT concentrations in the hypothalamus and cortex but did not significantly alter 5-HIAA concentrations[3].
References

[1]. Glover V, et al. Isatin: Identity with the Purified Endogenous Monoamine Oxidase Inhibitor Tribulin. Journal of Neurochemistry, 51(2), 656–659.

[2]. Igosheva N, et al. Isatin, an endogenous monoamine oxidase inhibitor, triggers a dose- and time-dependent switch from apoptosis to necrosis in human neuroblastoma cells. Neurochem Int. 2005 Aug;47(3):216-24.

[3]. McIntyre IM, et al. Serotonergic effects of isatin: an endogenous MAO inhibitor related to tribulin. J Neural Transm Gen Sect. 1990;79(1-2):35-40.
Density 1.4±0.1 g/cm3
Boiling Point 360.3±52.0 °C at 760 mmHg
Melting Point 193-195 °C (dec.)(lit.)
Molecular Formula C8H5NO2
Molecular Weight 147.131
Flash Point 171.7±30.7 °C
Exact Mass 147.032028
PSA 46.17000
LogP -0.17
Vapour Pressure 0.0±1.8 mmHg at 25°C
Index of Refraction 1.679
Storage condition Store at RT.

CHEMICAL IDENTIFICATION

RTECS NUMBER :
NL7873000
CHEMICAL NAME :
Indole-2,3-dione
CAS REGISTRY NUMBER :
91-56-5
BEILSTEIN REFERENCE NO. :
0383659
LAST UPDATED :
199701
DATA ITEMS CITED :
9
MOLECULAR FORMULA :
C8-H5-N-O2
MOLECULAR WEIGHT :
147.14
WISWESSER LINE NOTATION :
T56 BMVVJ

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
5 gm/kg
TOXIC EFFECTS :
Peripheral Nerve and Sensation - flaccid paralysis without anesthesia (usually neuromuscular blockage) Behavioral - changes in motor activity (specific assay)
REFERENCE :
IJPPAZ Indian Journal of Physiology and Pharmacology. (All India Institute of Medical Sciences, Dept. of Physiology, Ansari Nagar, New Delhi 110 029, India) V.1- 1957- Volume(issue)/page/year: 6,145,1962
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
7740 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 27(8),54,1983
TYPE OF TEST :
LD - Lethal dose
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
>800 mg/kg
TOXIC EFFECTS :
Peripheral Nerve and Sensation - flaccid paralysis without anesthesia (usually neuromuscular blockage) Behavioral - changes in motor activity (specific assay)
REFERENCE :
IJPPAZ Indian Journal of Physiology and Pharmacology. (All India Institute of Medical Sciences, Dept. of Physiology, Ansari Nagar, New Delhi 110 029, India) V.1- 1957- Volume(issue)/page/year: 6,145,1962
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Unreported
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
725 mg/kg
TOXIC EFFECTS :
Behavioral - somnolence (general depressed activity)
REFERENCE :
RPTOAN Russian Pharmacology and Toxicology (English Translation). Translation of FATOAO. (Euromed Pub., 33, Woodlands Rd., Surbiton, Surrey, UK) V.30- 1967- Volume(issue)/page/year: 41,146,1978
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
330 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
NYKZAU Nippon Yakurigaku Zasshi. Japanese Journal of Pharmacology. (Nippon Yakuri Gakkai, c/o Kyoto Daigaku Igakubu Yakurigaku Kyoshitsu, Konoe-cho, Yoshida, Sakyo-ku, Kyoto 606, Japan) V.40- 1944- Volume(issue)/page/year: 55,1514,1959 ** OTHER MULTIPLE DOSE TOXICITY DATA **
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
43500 mg/kg/6W-I
TOXIC EFFECTS :
Blood - pigmented or nucleated red blood cells Blood - changes in serum composition (e.g. TP, bilirubin, cholesterol) Blood - changes in erythrocyte (RBC) count
REFERENCE :
GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 27(3),52,1983 ** REPRODUCTIVE DATA **
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Oral
DOSE :
200 mg/kg
SEX/DURATION :
male 1 day(s) pre-mating
TOXIC EFFECTS :
Reproductive - Paternal Effects - other effects on male
REFERENCE :
IJMRAQ Indian Journal of Medical Research. (Indian Council of Medical Research, Ansari Nagar, New Delhi 110 029, India) V.1- 1913- Volume(issue)/page/year: 67,73,1978 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - A1765 No. of Facilities: 3 (estimated) No. of Industries: 1 No. of Occupations: 1 No. of Employees: 198 (estimated) No. of Female Employees: 151 (estimated)
Personal Protective Equipment dust mask type N95 (US);Eyeshields;Gloves
Hazard Codes Xi,Xn
Risk Phrases R36/37/38
Safety Phrases S26-S36-S24/25
RIDADR 2811
WGK Germany 1
RTECS NL7873000
Packaging Group III
Hazard Class 6.1(b)
HS Code 2933990090
HS Code 2933990090
Summary 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%
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