2-Chloro-3-cyanopyridine supplier

Name
2-Chloro-3-cyanopyridine
EINECS 229-550-1
CAS No. 6602-54-6
Article Data23
CAS DataBase
Density 1.33 g/cm³
Solubility
Melting Point 104-107 °C(lit.)
Formula C₆H₃ClN₂
Boiling Point 257.6 °C at 760 mmHg
Molecular Weight 138.556
Flash Point 109.6 °C
Transport Information UN 3439 6.1/PG 3
Appearance white to light yellow crystal powder
Safety 26-36-36/37/39
Risk Codes 20/21/22-36/37/38
Molecular Structure
Hazard Symbols Xn, T, Xi
Synonyms Nicotinonitrile,2-chloro- (6CI,7CI,8CI);2-Chloro-3-pyridinecarbonitrile;3-Pyridinecarbonitrile,2-chloro-;3-Cyano-2-chloropyridine;NSC 73287;
PSA 36.68000
LogP 1.60668

Synthetic route

: 20577-27-9
2-hydroxy-3-cyanopyridine

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
With triethylamine; trichlorophosphate at 0 - 5℃; for 8.5h; Reagent/catalyst; Reflux;	96.6%
With P,P-dichlorophenylphosphine oxide; phosphorus pentachloride at 160℃; for 5h;	94.6%

: 14906-64-0
3-cyanopyridine N-oxide

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
With triethylamine; trichlorophosphate at 20 - 90℃; Temperature;	96%
With bis(trichloromethyl) carbonate; N-benzyl-N,N,N-triethylammonium chloride; triethylamine; sodium chloride In 1,2-dichloro-ethane at -10 - 0℃; for 2h; Solvent; Reagent/catalyst; Temperature;	91.41%
With oxalyl dichloride; triethylamine In dichloromethane at -70℃; for 0.5h; Inert atmosphere; regioselective reaction;	90.3%
With POCl2 for 6h; Heating;
With oxalyl dichloride; triethylamine In dichloromethane regioselective reaction;

: N-oxonicotinamide

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
With N-butylamine; triethylamine; trichlorophosphate In 1,2-dichloro-ethane at 10 - 100℃; for 10.3333h; Solvent; Reagent/catalyst; Temperature;	93.2%

: 36404-88-3
2-chloro-3-carbaldehydepyridine

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
With pyridine; ammonium peroxydisulfate; tris(2,2-bipyridine)ruthenium(II) hexafluorophosphate; 4-acetylamino-2,2,6,6-tetramethyl-1-piperidinoxy In acetonitrile at 0.5℃; for 24h; Molecular sieve; Sealed tube; Irradiation;	74%

: 1986-81-8
nicotinamide N-oxide

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
With trichlorophosphate for 3.5h; Heating;	59%
With phosphorus pentachloride; trichlorophosphate at 115 - 120℃;

: 100-54-9
pyridine-3-carbonitrile

A: 6602-54-6
2-chloro-3-pyridinecarbonitrile

B: 89284-61-7
4-chloro-nicotinonitrile

Conditions

Conditions	Yield
Stage #1: pyridine-3-carbonitrile With 2,2,6,6-tetramethyl-piperidine; n-butyllithium In tetrahydrofuran at -80℃; for 0.75h; Stage #2: With hexachloroethane In tetrahydrofuran at -80℃; for 0.75h;	A 7% B 37%
Stage #1: pyridine-3-carbonitrile With 2,2,6,6-tetramethyl-piperidine; n-butyllithium In tetrahydrofuran; hexane at -80℃; for 0.75h; Stage #2: With hexachloroethane In tetrahydrofuran; hexane at -80℃; for 0.75h; Further stages.;	A 7% B 37%

: 36404-88-3
2-chloro-3-carbaldehydepyridine

A: 6602-54-6
2-chloro-3-pyridinecarbonitrile

B: 10366-35-5
2-chloronicotinamide

Conditions

Conditions	Yield
With pyridine; tris(2,2-bipyridine)ruthenium(II) hexafluorophosphate; ammonium peroxydisulfate; 4-acetylamino-2,2,6,6-tetramethyl-1-piperidinoxy; ammonium carbamate In water; acetonitrile at 20℃; for 18h; Irradiation; Sealed tube;	A 30% B n/a

: 14906-64-0
3-cyanopyridine N-oxide

A: 33252-28-7
6-chloronicotinonitrile

B: 6602-54-6
2-chloro-3-pyridinecarbonitrile

C: 89284-61-7
4-chloro-nicotinonitrile

Conditions

Conditions	Yield
With trichlorophosphate at 110℃; for 2h; Yield given. Yields of byproduct given;

...Expand

: 1986-81-8
nicotinamide N-oxide

A: 33252-28-7
6-chloronicotinonitrile

B: 6602-54-6
2-chloro-3-pyridinecarbonitrile

C: 89284-61-7
4-chloro-nicotinonitrile

Conditions

Conditions	Yield
With trichlorophosphate for 3.5h; Heating; Yield given. Yields of byproduct given;

...Expand

: 19158-51-1
P-toluenesulfonyl cyanide

: 78607-36-0
2-chloro-3-iodopyridine

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
With isopropylmagnesium bromide 1.) THF, -40 deg C, 0.5 h, 2.) THF, -40 to 0 deg C; Yield given. Multistep reaction;

1-methyl-pyridone-(2)-carboxylic acid-(3)-amide: 1-methyl-pyridone-(2)-carboxylic acid-(3)-amide

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
With trichlorophosphate at 100℃; im Rohr;

2-chloro-pyridine-carboxylic acid-(3)-amide: 2-chloro-pyridine-carboxylic acid-(3)-amide

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
With phosphorus pentaoxide im Vakuum;
With trichlorophosphate at 100℃; im Rohr;

: 767-88-4
ricinidine

: 10026-13-8, 874483-75-7
phosphorus pentachloride

: 10025-87-3, 12599-09-6, 63736-95-8
trichlorophosphate

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
at 105℃; im Rohr;

...Expand

diazotized 3-amino-2-chloro-pyridine: diazotized 3-amino-2-chloro-pyridine

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
With potassium cyanide; copper(II) sulfate

ricinidine: ricinidine

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
With phosphorus pentachloride; trichlorophosphate at 105℃; im Rohr;

: 98-92-0
nicotinamide

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: aqueous H2O2; acetic acid 2: PCl5; POCl3 / 115 - 120 °C View Scheme

: 100-54-9
pyridine-3-carbonitrile

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

Conditions

Conditions	Yield
With hydrogenchloride; potassium chromate In water at 0 - 15℃;	9.77 g

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 623-51-8
ethyl 2-sulfanylacetate

: 52505-46-1
ethyl 3-aminothieno[2,3-b]pyridine-2-carboxylate

Conditions

Conditions	Yield
Stage #1: ethyl 2-sulfanylacetate With sodium hydride In dimethyl sulfoxide; mineral oil at 20℃; for 0.25h; Stage #2: 2-chloro-3-pyridinecarbonitrile In dimethyl sulfoxide; mineral oil at 20℃; for 3h;	100%
With sodium carbonate In ethanol at 90℃; for 2.5h;	94%
With sodium carbonate In ethanol for 4.5h; Heating / reflux;	93.2%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 6752-16-5
1H-pyrazolo[3,4-b]pyridin-3-amine

Conditions

Conditions	Yield
With hydrazine In ethanol at 170℃; for 0.166667h; Microwave irradiation;	100%
With hydrazine hydrate In ethanol for 12h; Reflux;	90%
With hydrazine hydrate In ethanol for 10h; Heating;	88%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 98-80-6
phenylboronic acid

: 39065-49-1
2-phenylpyridine-3-carbonitrile

Conditions

Conditions	Yield
With palladium on activated charcoal; sodium carbonate; triphenylphosphine In 1,2-dimethoxyethane at 80℃; for 9h; Suzuki-Miyaura coupling;	100%
With tetrakis(triphenylphosphine) palladium(0); potassium carbonate In toluene for 24h; Suzuki coupling; Heating;	94%
With dichloro bis(acetonitrile) palladium(II); C32H25NP2; sodium hydroxide In N,N-dimethyl-formamide at 125℃; for 4h; Suzuki-Miyaura coupling; Inert atmosphere;	93%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 20577-27-9
2-hydroxy-3-cyanopyridine

Conditions

Conditions	Yield
With acetic acid Heating;	100%
With acetic acid for 48h; Reflux;	95%
With acetic acid for 60h; Reflux;	70%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 931115-08-1
(3S)-1-methyl-3-phenylpiperazine

: 931115-11-6
2-[(2S)-4-methyl-2-phenyl-1-piperazinyl]-3-pyridinecarbonitrile

Conditions

Conditions	Yield
With potassium fluoride In N,N-dimethyl-formamide for 23.5h; Heating / reflux;	100%
With potassium fluoride In N,N-dimethyl-formamide for 23.5h; Heating / reflux;	100%
With triethylamine In N,N-dimethyl-formamide at 120 - 125℃; for 17h; Product distribution / selectivity;
With potassium fluoride In N,N-dimethyl-formamide for 23.5h; Reflux;

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 20577-27-9
pyrid-2-one-3-carbonitrile

Conditions

Conditions	Yield
With acetic acid for 12h; Reflux;	100%
With acetic acid at 0℃; for 24h;	6.28 g

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 3939-13-7
3-cyano-2-fluoropyridine

Conditions

Conditions	Yield
With 1,1′-bis(diphenylphosphino)-3,3′-di(tert-butyl)ferrocene; silver fluoride In toluene at 120℃; for 16h; Inert atmosphere; Schlenk technique;	99%
With cesium fluoride In dimethyl sulfoxide at 90℃; for 2h;	69%
With tetrabutyl phosphonium hydrogen difluoride at 80℃; for 2h;	88 % Chromat.
With p-methoxybenzoyl fluoride; 2,3-Dihydro-1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene In N,N-dimethyl-formamide at 25℃; for 16h; Inert atmosphere;	50 %Spectr.
With tetramethylammonium fluoride In N,N-dimethyl-formamide at 25℃; for 24h; Sealed tube;	93 %Spectr.

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 5271-27-2
1-methyl-3-phenylpiperazine

: 61337-88-0
3-cyano-2-(4-methyl-2-phenyl-1-piperazynyl)pyridine

Conditions

Conditions	Yield
With potassium fluoride In N,N-dimethyl-formamide at 140℃; for 6h;	99%
In N,N-dimethyl-formamide at 120 - 125℃; for 18h; Product distribution / selectivity;	40.9%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 250603-01-1
[4-[[2-(furan-2-yl)-5-methyl-4-oxazolyl]methoxy]-3-methoxyphenyl]methanol

: 3-cyano-2-[4-[[2-(furan-2-yl)-5-methyl-4-oxazolyl]methoxy]-3-methoxybenzyloxy]pyridine

Conditions

Conditions	Yield
With sodium hydride In N,N-dimethyl-formamide at 1 - 30℃; for 15h;	99%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 108-95-2
phenol

: 14178-15-5
3-cyanopyridine-2-phenyl ether

Conditions

Conditions	Yield
With potassium phosphate; bis(η3-allyl-μ-chloropalladium(II)); 1,2-bis(diphenylphosphino)-1'-(diisopropylphosphino)-3',4-di-tert-butyl ferrocene In toluene at 115℃; for 20h; Inert atmosphere;	99%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 75-77-4
chloro-trimethyl-silane

: 1644384-53-1
2,4-dichloro-6-[(4-fluorophenyl)thio]benzonitrile

Conditions

Conditions	Yield
Stage #1: 2-chloro-3-pyridinecarbonitrile With 2,2,6,6-tetramethyl-piperidine; n-butyllithium; lithium chloride; magnesium chloride In tetrahydrofuran; hexane at -78℃; Inert atmosphere; Schlenk technique; Stage #2: chloro-trimethyl-silane In tetrahydrofuran; hexane at -78 - 20℃; for 0.25h; Inert atmosphere; Schlenk technique; regioselective reaction;	99%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 156-38-7
4-hydroxyphenylacetate

: 2-(4-((3-cyanopyridin-2-yl)oxy)phenyl)acetic acid hydrochloride

Conditions

Conditions	Yield
Stage #1: 2-chloro-3-pyridinecarbonitrile; 4-hydroxyphenylacetate With potassium carbonate In dimethyl sulfoxide at 60℃; for 14h; Stage #2: With hydrogenchloride In water; dimethyl sulfoxide	99%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 10366-35-5
2-chloronicotinamide

Conditions

Conditions	Yield
Stage #1: 2-chloro-3-pyridinecarbonitrile With sulfuric acid at 90℃; for 2h; Stage #2: With ammonium hydroxide for 1h; Cooling with ice;	98%
With Acetaldehyde oxime; copper(II) oxide In water for 10h; Reflux;	96%
With N-ethyl-N-hydroxy-ethanamine; water at 100℃; for 3h;	95%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 150-19-6
O-methylresorcine

: 3-cyano-2-(3-methoxyphenoxy)pyridine

Conditions

Conditions	Yield
With potassium phosphate; bis(η3-allyl-μ-chloropalladium(II)); 1,2-bis(diphenylphosphino)-1'-(diisopropylphosphino)-3',4-di-tert-butyl ferrocene In toluene at 115℃; for 20h; Inert atmosphere;	98%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 33397-21-6
tris(4-methoxyphenyl)bismuth

: 1246461-85-7
2-(4-methoxy)phenylpyridine-3-carbonitrile

Conditions

Conditions	Yield
With tetrakis(triphenylphosphine) palladium(0); caesium carbonate In N,N-dimethyl acetamide at 90℃; for 4h; Inert atmosphere; Schlenk technique;	98%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 108-98-5
thiophenol

: 35620-68-9
2-phenylsulfanylnicotinonitrile

Conditions

Conditions	Yield
Stage #1: thiophenol With sodium hydride In N,N-dimethyl-formamide; mineral oil at 25℃; for 1h; Inert atmosphere; Stage #2: 2-chloro-3-pyridinecarbonitrile In N,N-dimethyl-formamide; mineral oil at 25℃; for 16h; Inert atmosphere;	97%
With water at 100℃; for 2h;	95%
With bis(η3-allyl-μ-chloropalladium(II)); 1,1',3,3'-tetrakis(diphenylphosphino)ferrocene; sodium t-butanolate In toluene for 17h; Catalytic behavior; Inert atmosphere; Schlenk technique; Heating;	95%
With 1,1'-bis-(diphenylphosphino)ferrocene; bis(η3-allyl-μ-chloropalladium(II)); sodium t-butanolate In toluene at 120℃; for 17h;	78%

: 288-32-4
1H-imidazole

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: C9H6N4

Conditions

Conditions	Yield
With potassium carbonate In N,N-dimethyl-formamide at 150℃; for 2h; Inert atmosphere; Green chemistry;	97%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 123324-71-0
4-tert-butylphenylboronic acid

: C16H16N2

Conditions

Conditions	Yield
With palladium diacetate; potassium carbonate; nixantphos In tetrahydrofuran; water at 20℃; for 6h; Suzuki-Miyaura Coupling;	97%

: 110-85-0
piperazine

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 84951-44-0
2-(piperazin-1-yl)nicotinonitrile

Conditions

Conditions	Yield
In ethanol 1.) ice bath, 2.) room temperature;	96.1%
With N-ethyl-N,N-diisopropylamine In DMF (N,N-dimethyl-formamide) for 15h;	81%
With sodium hydroxide In ethanol	72.5%

: 342024-34-4
3-(5-methyl-2-phenyl-4-oxazolylmethoxy)-5-isoxazolylmethanol

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 2-[[3-[(5-methyl-2-phenyl-4-oxazolyl)methoxy]-5-isoxazolyl]methoxy]nicotinonitrile

Conditions

Conditions	Yield
With sodium hydride In N,N-dimethyl-formamide at 0 - 30℃; for 1.5h;	96%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 68-12-2, 33513-42-7
N,N-dimethyl-formamide

: 60138-76-3
2-(N,N-dimethylamine)-3-pyridinecarbonitrile

Conditions

Conditions	Yield
at 180℃; for 0.416667h; Microwave irradiation;	96%
for 22h; Reflux; neat (no solvent);	73%
Heating;

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 1344727-27-0
(4-(ethoxycarbonyl)phenyl)zinc pivalate

: 1208081-99-5
ethyl 4-(3-cyanopyridin-2-yl)benzoate

Conditions

Conditions	Yield
[1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene](3-chloropyridyl) palladium(II) dichloride In ethyl acetate at 22 - 25℃; for 12h; Product distribution / selectivity; Negishi Coupling Reaction;	96%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 24653-75-6
1-mercaptopropan-2-one

: 52505-41-6
2-acetyl-3-aminopyrido[2,3-b]thiophene

Conditions

Conditions	Yield
With potassium carbonate In water at 90℃; for 2h; Green chemistry;	96%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 1521-51-3
rac-3-bromocyclohexene

: 1644384-68-8
2-chloro-4-(cyclohex-2-en-1-yl)-3-cyanopyridine

Conditions

Conditions	Yield
Stage #1: 2-chloro-3-pyridinecarbonitrile With 2,2,6,6-tetramethyl-piperidine; n-butyllithium; copper(I) cyanide di(lithium chloride) In tetrahydrofuran; hexane at -78℃; Inert atmosphere; Schlenk technique; Stage #2: rac-3-bromocyclohexene In tetrahydrofuran; hexane at -78 - 0℃; for 1.16667h; Inert atmosphere; Schlenk technique; regioselective reaction;	96%
Stage #1: 2-chloro-3-pyridinecarbonitrile With copper(I) cyanide di(lithium chloride); 2,2,6,6-tetramethylpiperidinyl-lithium In tetrahydrofuran at 0℃; for 0.0111111h; Flow reactor; Inert atmosphere; Stage #2: rac-3-bromocyclohexene In tetrahydrofuran at 0℃; for 1h; Flow reactor; Inert atmosphere; regioselective reaction;	89%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 106-54-7
p-Chlorothiophenol

: 2-((4-chlorophenyl)thio)nicotinonitrile

Conditions

Conditions	Yield
With bis(η3-allyl-μ-chloropalladium(II)); 1,1',3,3'-tetrakis(diphenylphosphino)ferrocene; sodium t-butanolate In toluene for 17h; Catalytic behavior; Inert atmosphere; Schlenk technique; Heating;	96%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 371-42-6
4-Fluorothiophenol

: 2-((4-fluorophenyl)thio)nicotinonitrile

Conditions

Conditions	Yield
With bis(η3-allyl-μ-chloropalladium(II)); 1,1',3,3'-tetrakis(diphenylphosphino)ferrocene; sodium t-butanolate In toluene for 17h; Catalytic behavior; Inert atmosphere; Schlenk technique; Heating;	96%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 38692-80-7
2-(3-bromo-4-hydroxyphenyl)acetic acid

: 2-(3-bromo-4-((3-cyanopyridin-2-yl)oxy)phenyl)acetic acid

Conditions

Conditions	Yield
With potassium carbonate In dimethyl sulfoxide at 80℃; for 24h;	96%

: 6602-54-6
2-chloro-3-pyridinecarbonitrile

: 109-73-9
N-butylamine

: 74611-50-0
2-(butylamino)pyridine-3-carbonitrile

Conditions

Conditions	Yield
In isopropyl alcohol Heating;	95%
at 165 - 180℃; for 1h;	70%

2-Chloro-3-cyanopyridine Specification

The 2-Chloro-3-cyanopyridine, with the CAS registry number 6602-54-6, is also known as 3-Cyano-2-chloropyridine.It belongs to the product Pharmaceutical Intermediates. Its EINECS number is 229-550-1. This chemical's molecular formula is C₆H₃ClN₂ and molecular weight is 138.56.What's more,Its systematic name is 2-Chloronicotinonitrile.

Physical properties about 2-Chloro-3-cyanopyridine are:(1)ACD/LogP: 1.168; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.17; (4)ACD/LogD (pH 7.4): 1.17; (5)ACD/BCF (pH 5.5): 4.55; (6)ACD/BCF (pH 7.4): 4.55; (7)ACD/KOC (pH 5.5): 102.87; (8)ACD/KOC (pH 7.4): 102.87; (9)#H bond acceptors: 2; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Index of Refraction: 1.566; (13)Molar Refractivity: 33.946 cm³; (14)Molar Volume: 104.13 cm³; (15)Surface Tension: 56.673999786377 dyne/cm; (16)Density: 1.331 g/cm³; (17)Flash Point: 109.591 °C; (18)Enthalpy of Vaporization: 49.516 kJ/mol; (19)Boiling Point: 257.596 °C at 760 mmHg; (20)Vapour Pressure: 0.0140000004321337 mmHg at 25°C.

2-Chloro-3-cyanopyridine may cause damage to health. It is irritating to eyes, respiratory system and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. Whenever you will contact it, please wear suitable protective clothing, gloves and eye/face protection. In case of accident or if you feel unwell seek medical advice immediately .

You can still convert the following datas into molecular structure:
(1)SMILES:N#Cc1cccnc1Cl;
(2)Std. InChI:InChI=1S/C6H3ClN2/c7-6-5(4-8)2-1-3-9-6/h1-3H;
(3)Std. InChIKey:JAUPUQRPBNDMDT-UHFFFAOYSA-N.

Product Name

2-Chloro-3-cyanopyridine

Synthetic route

2-Chloro-3-cyanopyridine Specification

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