STIGMATELLIN Property

Melting point:

129°C

Boiling point:

520.22°C (rough estimate)

Density 

1.0924 (rough estimate)

refractive index 

1.5800 (estimate)

storage temp. 

−20°C

pka

8.67±0.40(Predicted)

Safety

Hazard Codes 

T

Risk Statements 

25

Safety Statements 

45

RIDADR 

UN 2811 6.1/PG 2

WGK Germany 

3

RTECS 

GB7972000

F 

8-10-23

HazardClass 

6.1(a)

PackingGroup 

II

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H300Fatal if swallowed

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P321Specific treatment (see … on this label).

P330Rinse mouth.

P405Store locked up.

P501Dispose of contents/container to..…

STIGMATELLIN Chemical Properties,Usage,Production

Uses

Stigmatellin is a cytochrome bc1 complex inhibitor.

Definition

ChEBI: A member of the class of chromones that is isolated from Stigmatella aurantiaca Sg a15.

Purification Methods

Stigmatellin A is stable in aqueous solution at neutral pH but decomposes at pH <5. It is purified by recrystallisation from toluene/hexane. It has UV max: nm () 248sh (4,100), 258 (59,500), 267 (65,500)max: 3550m, 1645chs, 1635ss, 1620ss, 1590s, 1510m and 905m cm-1. It gives colour reactions at 110o with vanillin/H2SO4 (grey), Ce(IV)/(NH4)2SO4 (yellow) and phosphomolybdate (blue-grey). [H.fle et al. Justus Liebigs Ann Chem 1882 1984.] It inhibits electron transport [Jagow & Link Methods Enzymol 126 253 1986, Robertson et al. Biochemistry 32 1310 1933], and has antibiotic properties [Kunze et al. J Antibiot 37 454 1984]. The 7t,9t,11c-isomer is Stigmatellin B.