pyrrole
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IUPAC name :1H-pyrrole
InChI :InChI=1/C4H5N/c1-2-4-5-3-1/h1-5H
InChIKey :KAESVJOAVNADME-UHFFFAOYAK
SMILES :C1=CNC=C1
cas number :109-97-7
(EINECS) number :203-724-7
beilstein number :0001159
fema number :3386
coe number :2318
jecfa number :1314
fl. number :14.041
molar refractivity :20.68 ± 0.3 cm3
parachor :166.8 ± 4.0 cm3
index of refraction :1.522 ± 0.02
surface tension :36.7 ± 3.0 dyne/cm
density :0.990 ± 0.06 g/cm3
polarizability :8.20 ± 0.5 10-24cm3
XlogP : 0.80
molecular weight : 67.0892000
formula :C4 H5 N
BioActivity Analysis :48415102
NMR Predictor :Predict
 
 
export tariff code :2933.90
fda reg :unspecified

Suppliers :
Penta :pyrrole
Sigma-Aldrich-SAFC :Pyrrole
≥98%, FCC
Odor:  nutty; ethereal; sweet

organoleptics :
odor type :nutty
odor strength :high ,
recommend smelling in a 0.10 % solution or less
odor description :
at 0.10 % in propylene glycol.  
sweet warm nutty ether

properties :
appearence :colorless to pale yellow clear liquid
assay : 98.00 to 100.00 %   
Food Chemicals Codex Listed :Yes
specific gravity :0.95500 to 0.97500 @ 25.00 °C.
pounds per gallon - calc. : 7.947 to 8.113
refractive index :1.50700 to 1.51000 @ 20.00 °C.
melting point : -23.00 °C. @ 760.00 mm Hg
boiling point : 130.00 to 131.00 °C. @ 760.00 mm Hg
vapor pressure :8.36000 mm/Hg @ 25.00 °C.
vapor density :2.31 ( Air = 1 )
flash point : 92.00  °F.  TCC  ( 33.33 °C. )
logP (o/w) : 0.75

safety :
most important hazard(s) :T - Toxic.
  R 10 - Flammable.
R 20 - Harmful by inhalation.
R 25 - Toxic if swallowed.
R 41 - Risk of serious damage to eyes.
S 01/02 - Keep locked up and out of the reach of children.
S 16 - Keep away from sources of ignition - No Smoking.
S 20/21 - When using do not eat, drink or smoke.
S 23 - Do not breath vapour.
S 24/25 - Avoid contact with skin and eyes.
S 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S 36/37/39 - Wear suitable clothing, gloves and eye/face protection.
S 45 - In case of accident or if you feel unwell seek medical advice immediately.
Oral Toxicity(LD50) :
  Oral-Rabbit    147.00  mg/kg

Intraperitoneal-Rabbit    150.00  mg/kg

Intraperitoneal-Mouse    98.00  mg/kg

Dermal Toxicity(LD50) :
  Subcutaneous-Rabbit  250.00  mg/kg

Subcutaneous-Mouse  61.00  mg/kg

Inhalation Toxicity(LC50) :
  Not determined
 

safety in use :
Maximised Survey-derived Daily Intakes (MSDI-EU) :0.085 (μg/capita/day)
Maximised Survey-derived Daily Intakes (MSDI-USA) :0.01 (μg/capita/day)
 
recommendation for pyrrole usage levels up to :
 not for fragrance use.
recommendation for pyrrole usage levels up to :
  3.0000 ppm in the flavor.

safety references :
European Food Safety Athority(efsa) :Flavor usage levels; Subacute, Subchronic, Chronic and Carcinogenicity Studies; Developmental / Reproductive Toxicity Studies; Genotoxicity Studies...
EPI System :view
NLM Hazardous Substances Data Bank :search
Chemical Carcinogenesis Research Information System :Search
AIDS Citations :Search
Cancer Citations :Search
Toxicology Citations :Search
Env. Mutagen Info. Center :Search
Canada Domestic Sub. List :Yes
EPA Chem. Sub. Inventory : Yes
WISER :UN 1992
 
WGK Germany :2
 
 
 
 1H-pyrrole
(EINECS) number :203-724-7
RTECS :UX9275000 for 109-97-7
chemidplus :000109977
EPA Substance Registry Services :109-97-7
dtp/nci :62777

references :
 1H-pyrrole
fl. number :14.041
jecfa number :1314
NIST Chemistry WebBook :3965432890
pubchem :151142

other :
VCF-Online: VCF Volatile Compounds in Food
synonyms :
 azole
1-aza-2,4-cyclopentadiene
 divinylene imine
 imidole
 parzate
1H-pyrrole
monopyrrole

soluble in :
 alcohol
 fixed oils
 water, 45000 mg/L @ 25C

(odor and/or flavor) blends with :
 acetal
 acetaldehyde
 acetaldehyde 1,3-octane diol acetal
 acetaldehyde diisoamyl acetal
 acetaldehyde dimethyl acetal
 acetone
 acetyl acetaldehyde dimethyl acetal
 acetyl propionyl
2-acetyl pyrazine
3-acetyl pyridine
2-acetyl pyrrole
 acetyl pyrroline
2-acetyl thiazole
2-acetyl-2-thiazoline
5-acetyl-2,3-dihydro-1,4-thiazine
3-acetyl-2,5-dimethyl furan
2-acetyl-3-ethyl pyrazine
2-acetyl-3-methyl pyrazine
2-acetyl-3,5-dimethyl pyrazine
2-acetyl-5-methyl furan
 aconitic acid
 allyl 2-ethyl butyrate
 amyl acetate
isoamyl acetoacetate
alpha-amyl cinnamaldehyde diethyl acetal
 amyl formate
isoamyl formate
 amyl heptanoate
isoamyl nonanoate
alpha-angelica lactone
 anisole
 benzothiazole
 benzyl methyl ether
 bornyl isobutyrate
 boronia butenal
isobutyl acetate
isobutyl alcohol
isobutyl formate
 butyl methyl ketone
 butyl octanoate
isobutyl propionate
 butyramide
 butyroin
 carbitol
 chocolate pyrazine A
 chocolate pyrazine B
 cocoa pyrazine
3,6-cocoa pyrazine
 coconut absolute
 coffee furanone
 coumane
 coumarin
para-cresyl laurate
 cyclohexyl formate
 cyclohexyl methyl pyrazine
(E,E)-2,4-decadien-1-al
 decyl propionate
 diethyl sulfide
2,5-diethyl thiazole
3,5-diethyl-2-methyl pyrazine
2,5-diethyl-3-methyl pyrazine
2,5-diethyl-4-methyl thiazole
 difurfuryl ether
6,7-dihydro-2,3-dimethyl-5H-cyclopentapyrazine
 dihydroxyacetophenone
 dimethyl dihydrocyclopentapyrazine
2,5-dimethyl furan
2,3-dimethyl pyrazine
2,5-dimethyl pyrazine
2,6-dimethyl pyridine
2,5-dimethyl thiazole
4,5-dimethyl thiazole
2,5-dimethyl thiophene
4,5-dimethyl-2-ethyl-3-thiazoline
2,4-dimethyl-5-vinyl thiazole
 ethanol
2-ethoxythiazole
 ethyl 2-hydroxy-2-methyl butyrate
 ethyl acetate
2-ethyl butyl acetate
2-ethyl butyraldehyde
 ethyl formate
2-ethyl pyrazine
 ethyl pyruvate
 ethyl sorbate
1-ethyl-2-acetyl pyrrole
5-ethyl-2-methyl pyridine
2-ethyl-3-methoxypyrazine
2-ethyl-4-methyl thiazole
(Z+E)-5-ethyl-4-methyl-2-(2-butyl) thiazoline
(Z+E)-5-ethyl-4-methyl-2-(2-methyl propyl) thiazoline
 filbert heptenone
 filbert pyrazine
 furfuryl thioacetate
3-(2-furyl) acrolein
 hazelnut oleoresin
 hazelnut pyrazine
(E,E)-2,4-heptadien-1-ol
gamma-heptalactone
2-heptenoic acid
2-heptyl furan
2,4-hexadien-1-ol
3,4-hexane dione
 hexanol
3-hexanol
1-hexen-3-ol
4-hexen-3-one
2-hexyl-5 or 6-keto-1,4-dioxane
4-hydroxybenzoic acid
 maraniol
 menthofuran
2-methoxypyrazine
 methyl 2-(methyl thio) acetate
 methyl acetate
2'-methyl acetophenone
2-methyl allyl butyrate
2-methyl anisole
para-methyl anisole
2-methyl butyraldehyde
 methyl ethyl ketone
2-methyl furan
 methyl hexanoate
2-methyl pyrazine
2-methyl quinoxaline
5-methyl quinoxaline
4-methyl thiazole
2-methyl thio-3,5 or 6-methyl pyrazine
2-(methyl thio) acetaldehyde
S-(methyl thio) hexanoate
 methyl tiglate
2-methyl valeraldehyde
 methyl valerate
3-methyl-2-buten-1-al
2-methyl-3-(methyl thio) pyrazine
2-methyl-3-propyl pyrazine
2-methyl-3,(5 or 6)-ethoxypyrazine
2-methyl-5-isopropyl pyrazine
(E,E)-2,4-nonadien-1-al
(E,Z)-2,6-nonadien-1-yl acetate
 nutty cyclohexenone
 nutty quinoxaline
 nutty thiazole
 peanut dithiazine
 peanut oxazole
2-pentanone
3-pentanone
(Z)-2-penten-1-ol
 popcorn pyrimidine
isopropenyl acetate
 propionaldehyde
2-propionyl thiazole
2-propionyl-2-thiazoline
isopropyl 2-methyl butyrate
isopropyl acetate
 propyl benzoate
isopropyl butyrate
 propyl formate
isopropyl formate
isopropyl propionate
isopropyl pyrazine
2-propyl pyridine
 propyl valerate
isopropyl valerate
 pyrazines mixture
 pyrazinyl methyl sulfide
 pyruvaldehyde
 saffron pyranone
 salicylic acid
 sandalwood oil
 shoyu pyrazine
 sulfuryl butyrate
 sulfuryl decanoate
 sulfuryl formate
 sulfuryl hexanoate
 sulfuryl isobutyrate
 sulfuryl octanoate
 sulfuryl propionate
 tetrahydrofurfuryl acetate
2,3,5,6-tetramethyl pyrazine
 thiazole
(E)-tiglic aldehyde
 tobacco butenal
 tonka bean absolute
 tonka bean resinoid
2,4,5-trimethyl oxazole
2,3,5-trimethyl pyrazine
 tropical thiazole
 valeraldehyde
 valeraldehyde dibutyl acetal
 valeraldehyde propylene glycol acetal
isovaleraldehyde propylene glycol acetal
2-vinyl pyrazine
 vinyl sulfurol
 whiskey lactone

(odor and/or flavor) used in :
 nut
 tobacco tabac tabaco

natural occurrence in :
vervain leaf



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