accessibility menu, dialog, popup

UserName

Organiska sulfonsyror och derivat

Organiska föreningar som består av sulfonsyra med organiska funktionella gruppsubstitutioner; inkluderar föreningar som härrör från organiska sulfonsyror.
Kvantitet 
  • (4)
  • (10)
  • (1)
  • (2)
  • (17)
  • (2)
  • (19)
  • (2)
  • (2)
  • (26)
  • (7)
  • (6)
  • (3)
  • (2)
  • (1)
  • (3)
  • (25)
  • (1)
  • (1)
  • (15)
  • (3)
  • (8)
  • (1)
Molekylvikt (g/mol) 
  • (5)
  • (3)
  • (3)
  • (2)
  • (2)
  • (4)
  • (4)
  • (6)
  • (3)
  • (3)
  • (10)
  • (2)
  • (3)
  • (3)
  • (2)
  • (6)
  • (4)
  • (4)
  • (2)
  • (1)
  • (2)
  • (3)
  • (3)
  • (2)
  • (3)
  • (3)
  • (2)
  • (3)
  • (3)
  • (4)
  • (4)
  • (3)
  • (3)
  • (5)
  • (3)
  • (3)
  • (2)
  • (2)
  • (3)
  • (2)
  • (3)
  • (4)
  • (1)
  • (2)
  • (17)
Procent renhet 
  • (3)
  • (6)
  • (2)
  • (3)
  • (3)
  • (5)
  • (1)
  • (28)
  • (38)
  • (3)
  • (42)
  • (3)
Fysisk form 
  • (1)
  • (5)
  • (10)
  • (2)
  • (1)
  • (3)
  • (1)
  • (3)
  • (3)
  • (3)
  • (4)
  • (19)
  • (6)
  • (25)
Kokpunkt 
  • (2)
  • (1)
  • (4)
  • (4)
  • (3)
  • (3)
  • (5)
  • (3)
  • (1)
  • (6)
  • (3)
  • (3)
  • (2)
  • (4)
  • (3)
  • (3)
  • (3)
  • (5)
  • (3)
  • (3)
  • (1)
  • (3)
  • (2)
  • (3)
  • (1)
  • (2)
Keyword Search: methanesulfonate Rensa alla val

Filtrerade sökresultat

Produkter från vissa av våra leverantörer visas inte i filtrerade sökresultat. Vänligen Rensa alla filter för att se dessa produkter.

Begränsa resultat

Välj filter

Klart

Keyword Search

methanesulfonate

Begränsa resultat

Begränsa resultat

Inga resultat hittades inom denna kategori. Försök att ta bort några valda filter och försök igen.

Kategori

Specialerbjudande

  • (29)
  • (29)

Varumärken

  • (1)
  • (1)
  • (8)
  • (5)
  • (1)
  • (61)
  • (86)
  • (3)

specialprogram

  • (2)
  • (5)

Kvantitet

  • (4)
  • (10)
  • (1)
  • (2)
  • (17)
  • (2)
  • (19)
  • (2)
  • (2)
  • (26)
  • (7)
  • (6)
  • (3)
  • (2)
  • (1)
  • (3)
  • (25)
  • (1)
  • (1)
  • (15)
  • (3)
  • (8)
  • (1)

Molekylvikt (g/mol)

  • (5)
  • (3)
  • (3)
  • (2)
  • (2)
  • (4)
  • (4)
  • (6)
  • (3)
  • (3)
  • (10)
  • (2)
  • (3)
  • (3)
  • (2)
  • (6)
  • (4)
  • (4)
  • (2)
  • (1)
  • (2)
  • (3)
  • (3)
  • (2)
  • (3)
  • (3)
  • (2)
  • (3)
  • (3)
  • (4)
  • (4)
  • (3)
  • (3)
  • (5)
  • (3)
  • (3)
  • (2)
  • (2)
  • (3)
  • (2)
  • (3)
  • (4)
  • (1)
  • (2)
  • (17)

Procent renhet

  • (3)
  • (6)
  • (2)
  • (3)
  • (3)
  • (5)
  • (1)
  • (28)
  • (38)
  • (3)
  • (42)
  • (3)

Fysisk form

  • (1)
  • (5)
  • (10)
  • (2)
  • (1)
  • (3)
  • (1)
  • (3)
  • (3)
  • (3)
  • (4)
  • (19)
  • (6)
  • (25)

Kokpunkt

  • (2)
  • (1)
  • (4)
  • (4)
  • (3)
  • (3)
  • (5)
  • (3)
  • (1)
  • (6)
  • (3)
  • (3)
  • (2)
  • (4)
  • (3)
  • (3)
  • (3)
  • (5)
  • (3)
  • (3)
  • (1)
  • (3)
  • (2)
  • (3)
  • (1)
  • (2)

Kvalitet

  • (9)
  • (3)
1 – 15 av 63 Resultat
1

Potassium methanesulfonate, 99%

CAS: 2386-56-3 Molekylformel: CH3KO3S Molekylvikt (g/mol): 134.19 MDL-nummer: MFCD00070544 InChI-nyckel: XWIJIXWOZCRYEL-UHFFFAOYSA-M Synonym: potassium methanesulfonate,methanesulfonic acid, potassium salt,potassium mesylate,potassium methylsulfonate,potassium methyl sulfonate,potassium methanesulphonate,unii-s99ib3em17,methanesulfonic acid potassium salt,methanesulfonic acid,potassium salt 1:1,methanesulfonic acid, potassium salt 1:1 PubChem CID: 23666501 IUPAC-namn: kalium;metansulfonat LEDER: CS(=O)(=O)[O-].[K+]

EDGE
Molekylformel CH3KO3S
PubChem CID 23666501
MDL-nummer MFCD00070544
IUPAC-namn kalium;metansulfonat
CAS 2386-56-3
InChI-nyckel XWIJIXWOZCRYEL-UHFFFAOYSA-M
LEDER CS(=O)(=O)[O-].[K+]
Molekylvikt (g/mol) 134.19
Synonym potassium methanesulfonate,methanesulfonic acid, potassium salt,potassium mesylate,potassium methylsulfonate,potassium methyl sulfonate,potassium methanesulphonate,unii-s99ib3em17,methanesulfonic acid potassium salt,methanesulfonic acid,potassium salt 1:1,methanesulfonic acid, potassium salt 1:1
2
Kampanjer är tillgängliga

Ethyl 3-aminobenzoate, methanesulfonic acid salt, 98%

CAS: 886-86-2 Molekylformel: C9H11NO2·CH4O3S Molekylvikt (g/mol): 261.29 MDL-nummer: MFCD00013176 InChI-nyckel: FQZJYWMRQDKBQN-UHFFFAOYSA-N Synonym: ethyl 3-aminobenzoate methanesulfonate,tricaine,tricaine methanesulfonate,finquel,metacaine,tricaine mesylate,3-aminobenzoic acid ethyl ester methanesulfonate,ethyl m-aminobenzoate methanesulfonate,ethyl 3-aminobenzoate methanesulfonic acid salt,3-aminobenzoic acid ethyl ester methanesulfonate salt PubChem CID: 261501 IUPAC-namn: etyl-3-aminobensoat;metansulfonsyra LEDER: CCOC(=O)C1=CC(=CC=C1)N.CS(=O)(=O)O

EDGE
Molekylformel C9H11NO2·CH4O3S
PubChem CID 261501
MDL-nummer MFCD00013176
IUPAC-namn etyl-3-aminobensoat;metansulfonsyra
CAS 886-86-2
InChI-nyckel FQZJYWMRQDKBQN-UHFFFAOYSA-N
LEDER CCOC(=O)C1=CC(=CC=C1)N.CS(=O)(=O)O
Molekylvikt (g/mol) 261.29
Synonym ethyl 3-aminobenzoate methanesulfonate,tricaine,tricaine methanesulfonate,finquel,metacaine,tricaine mesylate,3-aminobenzoic acid ethyl ester methanesulfonate,ethyl m-aminobenzoate methanesulfonate,ethyl 3-aminobenzoate methanesulfonic acid salt,3-aminobenzoic acid ethyl ester methanesulfonate salt
3

Methanesulfonic acid, 98+%

CAS: 75-75-2 Molekylformel: CH4O3S Molekylvikt (g/mol): 96.1 MDL-nummer: MFCD00007518 InChI-nyckel: AFVFQIVMOAPDHO-UHFFFAOYSA-N Synonym: methylsulfonic acid,methanesulphonic acid,methanesulfonicacid,kyselina methansulfonova,methansulfonsaeure,ccris 2783,kyselina methansulfonova czech,ch3so3h,methane sulfonic acid,sulfomethane PubChem CID: 6395 ChEBI: CHEBI:27376 IUPAC-namn: metansulfonsyra LEDER: CS(=O)(=O)O

Molekylformel CH4O3S
PubChem CID 6395
MDL-nummer MFCD00007518
IUPAC-namn metansulfonsyra
CAS 75-75-2
InChI-nyckel AFVFQIVMOAPDHO-UHFFFAOYSA-N
LEDER CS(=O)(=O)O
ChEBI CHEBI:27376
Molekylvikt (g/mol) 96.1
Synonym methylsulfonic acid,methanesulphonic acid,methanesulfonicacid,kyselina methansulfonova,methansulfonsaeure,ccris 2783,kyselina methansulfonova czech,ch3so3h,methane sulfonic acid,sulfomethane
4
Kampanjer är tillgängliga

Methanesulfonic acid, 99%, extra pure

CAS: 75-75-2 Molekylformel: CH4O3S Molekylvikt (g/mol): 96.1 MDL-nummer: MFCD00007518 InChI-nyckel: AFVFQIVMOAPDHO-UHFFFAOYSA-N Synonym: methylsulfonic acid,methanesulphonic acid,methanesulfonicacid,kyselina methansulfonova,methansulfonsaeure,ccris 2783,kyselina methansulfonova czech,ch3so3h,methane sulfonic acid,sulfomethane PubChem CID: 6395 ChEBI: CHEBI:27376 IUPAC-namn: metansulfonsyra LEDER: CS(=O)(=O)O

Molekylformel CH4O3S
PubChem CID 6395
MDL-nummer MFCD00007518
IUPAC-namn metansulfonsyra
CAS 75-75-2
InChI-nyckel AFVFQIVMOAPDHO-UHFFFAOYSA-N
LEDER CS(=O)(=O)O
ChEBI CHEBI:27376
Molekylvikt (g/mol) 96.1
Synonym methylsulfonic acid,methanesulphonic acid,methanesulfonicacid,kyselina methansulfonova,methansulfonsaeure,ccris 2783,kyselina methansulfonova czech,ch3so3h,methane sulfonic acid,sulfomethane
5
Kampanjer är tillgängliga

Isopropyl methanesulfonate, 99%

CAS: 926-06-7 Molekylformel: C4H10O3S Molekylvikt (g/mol): 138.19 MDL-nummer: MFCD00047802 InChI-nyckel: SWWHCQCMVCPLEQ-UHFFFAOYSA-N Synonym: isopropyl methanesulfonate,isopropyl mesylate,isopropylmethanesulfonate,methanesulfonic acid, 1-methylethyl ester,isopropyl methane sulphonate,2-propyl methanesulphonate,isopropyl methane sulfonate,methanesulfonic acid, isopropyl ester,isopropyl methanesulphonate,unii-t0k2txy26b PubChem CID: 13551 IUPAC-namn: propan-2-yl-metansulfonat LEDER: CC(C)OS(=O)(=O)C

Molekylformel C4H10O3S
PubChem CID 13551
MDL-nummer MFCD00047802
IUPAC-namn propan-2-yl-metansulfonat
CAS 926-06-7
InChI-nyckel SWWHCQCMVCPLEQ-UHFFFAOYSA-N
LEDER CC(C)OS(=O)(=O)C
Molekylvikt (g/mol) 138.19
Synonym isopropyl methanesulfonate,isopropyl mesylate,isopropylmethanesulfonate,methanesulfonic acid, 1-methylethyl ester,isopropyl methane sulphonate,2-propyl methanesulphonate,isopropyl methane sulfonate,methanesulfonic acid, isopropyl ester,isopropyl methanesulphonate,unii-t0k2txy26b
6
Kampanjer är tillgängliga

Methyl methanesulfonate, 99%

CAS: 66-27-3 Molekylformel: C2H6O3S Molekylvikt (g/mol): 110.13 MDL-nummer: MFCD00007557 InChI-nyckel: MBABOKRGFJTBAE-UHFFFAOYSA-N Synonym: methyl mesylate,methanesulfonic acid methyl ester,methanesulfonic acid, methyl ester,methylmethane sulfonate,methylmethansulfonat,methyl methanesulphonate,as-dimethyl sulfite,as-dimethyl sulphite,methylmethanesulfonate,methyl methansulfonate PubChem CID: 4156 ChEBI: CHEBI:25255 IUPAC-namn: metylmetansulfonat LEDER: COS(=O)(=O)C

Molekylformel C2H6O3S
PubChem CID 4156
MDL-nummer MFCD00007557
IUPAC-namn metylmetansulfonat
CAS 66-27-3
InChI-nyckel MBABOKRGFJTBAE-UHFFFAOYSA-N
LEDER COS(=O)(=O)C
ChEBI CHEBI:25255
Molekylvikt (g/mol) 110.13
Synonym methyl mesylate,methanesulfonic acid methyl ester,methanesulfonic acid, methyl ester,methylmethane sulfonate,methylmethansulfonat,methyl methanesulphonate,as-dimethyl sulfite,as-dimethyl sulphite,methylmethanesulfonate,methyl methansulfonate
7

Ethyl methanesulfonate, 99%

CAS: 62-50-0 Molekylformel: C3H8O3S Molekylvikt (g/mol): 124.154 MDL-nummer: MFCD00007559 InChI-nyckel: PLUBXMRUUVWRLT-UHFFFAOYSA-N Synonym: ethyl mesylate,ethyl methanesulphonate,half-myleran,methanesulfonic acid, ethyl ester,methanesulfonic acid ethyl ester,methylsulfonic acid, ethyl ester,rcra waste number u119,ethyl methansulphonate,ethyl ester of methylsulfonic acid,ethyl ester of methanesulfonic acid PubChem CID: 6113 ChEBI: CHEBI:23994 IUPAC-namn: etylmetansulfonat LEDER: CCOS(=O)(=O)C

Molekylformel C3H8O3S
PubChem CID 6113
MDL-nummer MFCD00007559
IUPAC-namn etylmetansulfonat
CAS 62-50-0
InChI-nyckel PLUBXMRUUVWRLT-UHFFFAOYSA-N
LEDER CCOS(=O)(=O)C
ChEBI CHEBI:23994
Molekylvikt (g/mol) 124.154
Synonym ethyl mesylate,ethyl methanesulphonate,half-myleran,methanesulfonic acid, ethyl ester,methanesulfonic acid ethyl ester,methylsulfonic acid, ethyl ester,rcra waste number u119,ethyl methansulphonate,ethyl ester of methylsulfonic acid,ethyl ester of methanesulfonic acid
8
Kampanjer är tillgängliga

Ethyl methanesulfonate, 99%

CAS: 62-50-0 Molekylformel: C3H8O3S Molekylvikt (g/mol): 124.15 MDL-nummer: MFCD00007559 InChI-nyckel: PLUBXMRUUVWRLT-UHFFFAOYSA-N Synonym: ethyl mesylate,ethyl methanesulphonate,half-myleran,methanesulfonic acid, ethyl ester,methanesulfonic acid ethyl ester,methylsulfonic acid, ethyl ester,rcra waste number u119,ethyl methansulphonate,ethyl ester of methylsulfonic acid,ethyl ester of methanesulfonic acid PubChem CID: 6113 ChEBI: CHEBI:23994 IUPAC-namn: etylmetansulfonat LEDER: CCOS(=O)(=O)C

Molekylformel C3H8O3S
PubChem CID 6113
MDL-nummer MFCD00007559
IUPAC-namn etylmetansulfonat
CAS 62-50-0
InChI-nyckel PLUBXMRUUVWRLT-UHFFFAOYSA-N
LEDER CCOS(=O)(=O)C
ChEBI CHEBI:23994
Molekylvikt (g/mol) 124.15
Synonym ethyl mesylate,ethyl methanesulphonate,half-myleran,methanesulfonic acid, ethyl ester,methanesulfonic acid ethyl ester,methylsulfonic acid, ethyl ester,rcra waste number u119,ethyl methansulphonate,ethyl ester of methylsulfonic acid,ethyl ester of methanesulfonic acid
9

Methyl methanesulfonate, 99%

CAS: 66-27-3 Molekylformel: C2H6O3S Molekylvikt (g/mol): 110.127 MDL-nummer: MFCD00007557 InChI-nyckel: MBABOKRGFJTBAE-UHFFFAOYSA-N Synonym: methyl mesylate,methanesulfonic acid methyl ester,methanesulfonic acid, methyl ester,methylmethane sulfonate,methylmethansulfonat,methyl methanesulphonate,as-dimethyl sulfite,as-dimethyl sulphite,methylmethanesulfonate,methyl methansulfonate PubChem CID: 4156 ChEBI: CHEBI:25255 IUPAC-namn: metylmetansulfonat LEDER: COS(=O)(=O)C

Molekylformel C2H6O3S
PubChem CID 4156
MDL-nummer MFCD00007557
IUPAC-namn metylmetansulfonat
CAS 66-27-3
InChI-nyckel MBABOKRGFJTBAE-UHFFFAOYSA-N
LEDER COS(=O)(=O)C
ChEBI CHEBI:25255
Molekylvikt (g/mol) 110.127
Synonym methyl mesylate,methanesulfonic acid methyl ester,methanesulfonic acid, methyl ester,methylmethane sulfonate,methylmethansulfonat,methyl methanesulphonate,as-dimethyl sulfite,as-dimethyl sulphite,methylmethanesulfonate,methyl methansulfonate
10

Methanesulfonic anhydride, 97%

CAS: 7143-01-3 Molekylformel: C2H6O5S2 Molekylvikt (g/mol): 174.19 MDL-nummer: MFCD00007556 InChI-nyckel: IZDROVVXIHRYMH-UHFFFAOYSA-N Synonym: methanesulfonic anhydride,methanesulfonic acid, anhydride,mesyl anhydride,mesic anhydride,methanesulphonic anhydride,methane sulfonic acid anhydride,methanesulfonyl methanesulfonate,methane sulfonic anhydride,methanesulfonic acid, 1,1'-anhydride,methanesulfonic acid methylsulfonyl ester PubChem CID: 81560 IUPAC-namn: metylsulfonylmetansulfonat LEDER: CS(=O)(=O)OS(=O)(=O)C

Molekylformel C2H6O5S2
PubChem CID 81560
MDL-nummer MFCD00007556
IUPAC-namn metylsulfonylmetansulfonat
CAS 7143-01-3
InChI-nyckel IZDROVVXIHRYMH-UHFFFAOYSA-N
LEDER CS(=O)(=O)OS(=O)(=O)C
Molekylvikt (g/mol) 174.19
Synonym methanesulfonic anhydride,methanesulfonic acid, anhydride,mesyl anhydride,mesic anhydride,methanesulphonic anhydride,methane sulfonic acid anhydride,methanesulfonyl methanesulfonate,methane sulfonic anhydride,methanesulfonic acid, 1,1'-anhydride,methanesulfonic acid methylsulfonyl ester
11

Methanesulfonic anhydride, 97%

CAS: 7143-01-3 Molekylformel: C2H6O5S2 Molekylvikt (g/mol): 174.18 InChI-nyckel: IZDROVVXIHRYMH-UHFFFAOYSA-N

Molekylformel C2H6O5S2
CAS 7143-01-3
InChI-nyckel IZDROVVXIHRYMH-UHFFFAOYSA-N
Molekylvikt (g/mol) 174.18
12
Kampanjer är tillgängliga

Methanesulfonic acid, 98%

CAS: 75-75-2 Molekylformel: CH4O3S Molekylvikt (g/mol): 96.1 InChI-nyckel: AFVFQIVMOAPDHO-UHFFFAOYSA-N Synonym: methylsulfonic acid,methanesulphonic acid,methanesulfonicacid,kyselina methansulfonova,methansulfonsaeure,ccris 2783,kyselina methansulfonova czech,ch3so3h,methane sulfonic acid,sulfomethane PubChem CID: 6395 ChEBI: CHEBI:27376 IUPAC-namn: metansulfonsyra LEDER: CS(=O)(=O)O

Molekylformel CH4O3S
PubChem CID 6395
IUPAC-namn metansulfonsyra
CAS 75-75-2
InChI-nyckel AFVFQIVMOAPDHO-UHFFFAOYSA-N
LEDER CS(=O)(=O)O
ChEBI CHEBI:27376
Molekylvikt (g/mol) 96.1
Synonym methylsulfonic acid,methanesulphonic acid,methanesulfonicacid,kyselina methansulfonova,methansulfonsaeure,ccris 2783,kyselina methansulfonova czech,ch3so3h,methane sulfonic acid,sulfomethane
13

Methanesulfonic acid, 70% aq. soln.

CAS: 75-75-2 Molekylformel: CH4O3S Molekylvikt (g/mol): 96.1 MDL-nummer: MFCD00007518 InChI-nyckel: AFVFQIVMOAPDHO-UHFFFAOYSA-N Synonym: methylsulfonic acid,methanesulphonic acid,methanesulfonicacid,kyselina methansulfonova,methansulfonsaeure,ccris 2783,kyselina methansulfonova czech,ch3so3h,methane sulfonic acid,sulfomethane PubChem CID: 6395 ChEBI: CHEBI:27376 IUPAC-namn: metansulfonsyra LEDER: CS(=O)(=O)O

Molekylformel CH4O3S
PubChem CID 6395
MDL-nummer MFCD00007518
IUPAC-namn metansulfonsyra
CAS 75-75-2
InChI-nyckel AFVFQIVMOAPDHO-UHFFFAOYSA-N
LEDER CS(=O)(=O)O
ChEBI CHEBI:27376
Molekylvikt (g/mol) 96.1
Synonym methylsulfonic acid,methanesulphonic acid,methanesulfonicacid,kyselina methansulfonova,methansulfonsaeure,ccris 2783,kyselina methansulfonova czech,ch3so3h,methane sulfonic acid,sulfomethane
14

Natriummetansulfonat, 98 %, Thermo Scientific Chemicals

CAS: 2386-57-4 Molekylformel: CH3NaO3S Molekylvikt (g/mol): 118.082 MDL-nummer: MFCD00064389 InChI-nyckel: KKVTYAVXTDIPAP-UHFFFAOYSA-M Synonym: sodium methanesulfonate,methanesulfonic acid sodium salt,methanesulfonic acid, sodium salt,sodium methanesulphonate,sodium mesylate,methylsulfonic acid sodium salt,75-75-2 parent,sodium methyl sulfonate,methanesulfonic acid, sodium salt 1:1,sodium methylsulfonate PubChem CID: 638112 IUPAC-namn: natrium;metansulfonat LEDER: CS(=O)(=O)[O-].[Na+]

Molekylformel CH3NaO3S
PubChem CID 638112
MDL-nummer MFCD00064389
IUPAC-namn natrium;metansulfonat
CAS 2386-57-4
InChI-nyckel KKVTYAVXTDIPAP-UHFFFAOYSA-M
LEDER CS(=O)(=O)[O-].[Na+]
Molekylvikt (g/mol) 118.082
Synonym sodium methanesulfonate,methanesulfonic acid sodium salt,methanesulfonic acid, sodium salt,sodium methanesulphonate,sodium mesylate,methylsulfonic acid sodium salt,75-75-2 parent,sodium methyl sulfonate,methanesulfonic acid, sodium salt 1:1,sodium methylsulfonate
15

Methanesulfonic acid, pure, 70% solution in water

CAS: 75-75-2 Molekylformel: CH4O3S Molekylvikt (g/mol): 96.1 MDL-nummer: MFCD00007518 InChI-nyckel: AFVFQIVMOAPDHO-UHFFFAOYSA-N Synonym: methylsulfonic acid,methanesulphonic acid,methanesulfonicacid,kyselina methansulfonova,methansulfonsaeure,ccris 2783,kyselina methansulfonova czech,ch3so3h,methane sulfonic acid,sulfomethane PubChem CID: 6395 ChEBI: CHEBI:27376 IUPAC-namn: metansulfonsyra LEDER: CS(=O)(=O)O

Molekylformel CH4O3S
PubChem CID 6395
MDL-nummer MFCD00007518
IUPAC-namn metansulfonsyra
CAS 75-75-2
InChI-nyckel AFVFQIVMOAPDHO-UHFFFAOYSA-N
LEDER CS(=O)(=O)O
ChEBI CHEBI:27376
Molekylvikt (g/mol) 96.1
Synonym methylsulfonic acid,methanesulphonic acid,methanesulfonicacid,kyselina methansulfonova,methansulfonsaeure,ccris 2783,kyselina methansulfonova czech,ch3so3h,methane sulfonic acid,sulfomethane