Methyl 4-Butylbenzoate
- CAS20651-69-8
- CatalogueRS-U082581
- FormulaC12H16O2
- MW192.25
CUSTOM SYNTHESIS
On this page
Product identification
| Product name | Methyl 4-Butylbenzoate |
|---|---|
| Catalogue No. | RS-U082581 |
| CAS No. | 20651-69-8 |
| Molecular formula | C12H16O2 |
| Molecular weight | 192.25 |
| Availability | Custom synthesis— made to order, typically 3–4 weeks |
| Standard type | Fine Chemicals |
| Drug substance | Pemetrexed |
| Also known as | Pemetrexed Impurity 129 |
| Storage | 2-8°C Refrigerator |
| Intended use | For laboratory and research use only. Not for human or veterinary use. |
What is stated on the certificate
Content and purity are assigned per lot and stated on the certificate of analysis issued for the batch you receive — they are not a catalogue-level figure. The certificate records the tests performed, the specification applied and the result obtained for that lot.
| Field | Basis |
|---|---|
| Identity | Spectroscopic and chromatographic methods appropriate to the material |
| Purity | Chromatographic purity, area normalisation unless stated otherwise |
| Assay / content | Mass balance, corrected for the stated volatiles and residue |
| Catalogue and batch numbers | RS-U082581 / batch number on the certificate |
| Retest date | Printed on the certificate for the lot supplied |
Frequently asked
What documentation is supplied with this lot?
A certificate of analysis (COA) is issued for the lot you receive. It records the catalogue number
RS-U082581 and the batch number, the tests performed, the
specification applied and the result obtained. A safety data sheet is supplied with the shipment.
Is the assigned value given on an “as is” basis?
Content and purity are stated per lot on the certificate of analysis, on an “as is” basis unless the certificate says otherwise. The analytical basis for the assigned value is stated on the certificate.
How should this material be stored?
Store as stated: 2-8°C Refrigerator. Re-test before use beyond the retest date printed on the certificate.
Do you supply pack sizes other than those listed?
Pack sizes are confirmed with the quotation. Quantities beyond the standard pack sizes can be quoted — send the quantity you need with your enquiry.
Finding this standard
Buyers reach this compound by CAS number, by catalogue number, through the drug substance it belongs to, or through the type of standard it is. Those routes all start here:
- Other impurities of Pemetrexed
- Fine Chemicals of this kind
- Documents for this item (COA, SDS)
- Certificate of analysis for RS-U082581
- Request a quotation for RS-U082581
Searching another way? Send the structure, a SMILES string or the pharmacopoeial name — a CAS number is not required for a non-compendial impurity. Write to sales@rssechem.com.
Other standards of Pemetrexed
All 66 further standards are listed here — every link is in the page, not loaded later.
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(R)-Pemetrexed
IN STOCKRS-I009204 -
Pemetrexed
BACK ORDERRS-P063030 -
Pemetrexed EP Impurity B & C mixture (1:1)
IN STOCKRS-P063026 -
Pemetrexed EP Impurity D
IN STOCKRS-P063003 -
Pemetrexed EP Impurity D Trisodium
IN STOCKRS-P063009 -
2-Amino-4-hydroxypyrrolo[2,3-D]pyrimidine
CUSTOM SYNTHESISRS-U056200 -
2-Chloro-4,6-dimethoxy-1,3,5-triazine
IN STOCKRS-U071129 -
3-Butyn-1-ol
IN STOCKRS-C004081 -
4-(4-Hydroxy-1-butynyl)benzoic Acid Methyl Ester
CUSTOM SYNTHESISRS-U067066 -
5-Methyl N-Carbobenzoxy-L-glutaMate
IN STOCKRS-P011996 -
D-Glutamic Acid diethyl ester hydrochloride
IN STOCKRS-U004004 -
D-Pemetrexed Disodium
IN STOCKRS-I010396 -
Diethyl Sulfite
IN STOCKRS-P063019 -
Dimethyl ((R)-4-amino-5-methoxy-5-oxopentanoyl)-D-glutamate
IN STOCKRS-P063217 -
Glutamic Anhydride
IN STOCKRS-P063020 -
L-Glutamic acid gamma-ethyl ester
CUSTOM SYNTHESISRS-C033005 -
Methyl (E)-4-(4-hydroxybut-1-en-1-yl)benzoate
IN STOCKRS-P140276 -
Methyl 4-(4-oxobut-1-en-1-yl)benzoate
IN STOCKRS-P140001 -
N-Methyl Pemetrexed
IN STOCKRS-P063008 -
Pemetrexed Alpha-Hydroxy lactum
BACK ORDERRS-P063006 -
Pemetrexed disodium salt 2.5 hydrate
IN STOCKRS-U044306 -
PEMETREXED DITROMETHAMINE DIHYDRATE
BACK ORDERRS-A012140 -
Pemetrexed-1-methyl Ester
BACK ORDERRS-P063010 -
Pemetrexed-d5
BACK ORDERRS-P063025 -
Phorbol 12-Myristate 13-acetate
CUSTOM SYNTHESISRS-U044565 -
sodium 1-hydroxy-4-(4-(methoxycarbonyl)phenyl)butane-1-sulfonate
BACK ORDERRS-U070874 -
Tris Pemetrexed
BACK ORDERRS-P063027 -
Pemetrexed Impurity 1
BACK ORDERRS-P063007 -
Pemetrexed Impurity 7
IN STOCKRS-P063011 -
Pemetrexed Impurity 8
IN STOCKRS-P063014 -
Glutamic Acid Impurity 9
IN STOCKRS-Z412RLX -
Pemetrexed Impurity 11
IN STOCKRS-Z393A8C -
Pemetrexed Impurity 13
BACK ORDERRS-Z401KQG -
Pemetrexed Impurity 15 (Mixture of Diastereomers)
IN STOCKRS-Z412NT4 -
Pemetrexed Impurity 16
IN STOCKRS-P063004 -
Pemetrexed Impurity 43
IN STOCKRS-Z401LHK -
Pemetrexed Impurity 48
CUSTOM SYNTHESISRS-I001AGI -
Pemetrexed Impurity 53 (53487-52-8)
IN STOCKRS-P063034 -
Pemetrexed Impurity 58
IN STOCKRS-P063018 -
Pemetrexed Impurity 63
IN STOCKRS-P063002 -
Pemetrexed Impurity 69
IN STOCKRS-P063016 -
Pemetrexed Impurity 71
CUSTOM SYNTHESISRS-I001BAB -
Pemetrexed Impurity 71
CUSTOM SYNTHESISRS-P063024 -
Pemetrexed Impurity 72 TFA salt
CUSTOM SYNTHESISRS-I001362 -
Pemetrexed Impurity 82
IN STOCKRS-P063032 -
Pemetrexed Impurity 86
CUSTOM SYNTHESISRS-P063036 -
Pemetrexed Impurity 94
IN STOCKRS-U096187 -
Pemetrexed Impurity 127 (155405-81-5)
IN STOCKRS-P063029 -
Pemetrexed Impurity 131
IN STOCKRS-P063031 -
Pemetrexed Impurity 134
IN STOCKRS-P063028 -
Pemetrexed Impurity 160
IN STOCKRS-P063005 -
Pemetrexed Impurity 162
IN STOCKRS-P063013 -
Pemetrexed Impurity 163
CUSTOM SYNTHESISRS-P063017 -
Pemetrexed Impurity 164
IN STOCKRS-P063021 -
Pemetrexed Impurity 165
IN STOCKRS-P063022 -
Pemetrexed Impurity 166
CUSTOM SYNTHESISRS-P063023 -
Pemetrexed Impurity 180
IN STOCKRS-P063033
![Chemical structure of (4-(2-(2-amino-1,5,6-trihydroxy-4-oxo-4,5,6,7-tetrahydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzoyl)-D-glutamic acid](/structures/w4/NPAUOPVSQZARJG-PHINPVJKSA-N.webp?v=8)
![Chemical structure of (S)-2-(4-(2-(2-Amino-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzamido)-5-methoxy-5-oxopentanoic acid](/structures/w4/KHRSEJRFFOKXIA-AWEZNQCLSA-N.webp?v=8)
![Chemical structure of 2-Amino-4-hydroxypyrrolo[2,3-D]pyrimidine](/structures/w4/OLAFFPNXVJANFR-UHFFFAOYSA-N.webp?v=8)
![Chemical structure of 4,6-Dimethoxy-1,3,5-triazin-2-yl 4-(2-(2-amino-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzoate](/structures/w4/RQWUEBYTHYCHRZ-UHFFFAOYSA-N.webp?v=8)
![Chemical structure of 4-(2-(2-Amino-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzoic acid hydrate](/structures/w4/ARMKTLJIRFNRQU-UHFFFAOYSA-N.webp?v=8)
![Chemical structure of 4-[2-(2-Amino-4,5,6,7-tetrahydro-4,6-dioxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoic Acid Methyl Ester](/structures/w4/GCIHXHRROKFHIV-UHFFFAOYSA-N.webp?v=8)
![Chemical structure of 4-[3-(2,4-diamino-6-oxo-1,6-dihydropyrimidin-5-yl)-4-nitrobutyl]benzoic acid ethyl ester](/structures/w4/ACCKNCOTHFSBAG-UHFFFAOYSA-N.webp?v=8)
![Chemical structure of N-[4-[2-(2-Amino-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]-L-glutamic Acid](/structures/w4/WBXPDJSOTKVWSJ-ZDUSSCGKSA-N.webp?v=8)
![Chemical structure of N-[4-[2-(2-Amino-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]-L-glutamic Acid 1,5-Diethyl Ester 4-Methylbenzenesulfonate](/structures/w4/UANBXQTVHOIGGQ-LMOVPXPDSA-N.webp?v=8)
![Chemical structure of Sodium (S)-2-(4-(2-(2-amino-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzamido)-5-methoxy-5-oxopentanoate](/structures/w4/HLLKREXRWOUSET-UQKRIMTDSA-M.webp?v=8)
Pharmacopoeial names (EP, USP, BP, JP) are used for identification purposes only and do not imply endorsement by those bodies. This product is supplied for laboratory and research use only — not for human or veterinary use.