Triethyl phosphite - ≥98% , CAS No.122-52-1

CAS: 122-52-1 Cat. No.: T105731 Molecular Weight: 166.16 Beilstein Registry Number: 956578 EC Number: 204-552-5 PubChem CID: 31215
AVAILABLE TO ORDER
GRADE & PURITY ≥98%
Synonyms
(EtO)3P | Fosforyn trojetylowy [Czech] | HSDB 895 | MFCD00009084 | NCGC00257080-01 | Triethyl phosphite [UN2323] [Flammable liquid] | Tox21_303083 | 4-01-00-01333 (Beilstein Handbook Reference) | EINECS 204-552-5 | tri ethyl phosphite | Q414714 | DTXCID5
Storage
Room temperature,Argon charged
Shipped In
FedEx DG Service
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Size
Status
Price
Qty
100ml
T105731-100ml
2

$17.90

$21.90
Save $4.00 (18.26%)
500ml
T105731-500ml
2
$38.90
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Why this grade

≥98% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Room temperature,Argon charged Ships FedEx DG Service Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 19 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
(EtO)3P | Fosforyn trojetylowy [Czech] | HSDB 895 | MFCD00009084 | NCGC00257080-01 | Triethyl phosphite [UN2323] [Flammable liquid] | Tox21_303083 | 4-01-00-01333 (Beilstein Handbook Reference) | EINECS 204-552-5 | tri ethyl phosphite | Q414714 | DTXCID5
Specifications & Purity
≥98%
Storage
Room temperature, Argon charged
Shipped In
FedEx DG Service
This product requires cold chain shipping. Ground and other economy services are not available.
Purity
≥98%
Names and Identifiers
Pubchem Sid504753430
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/504753430
Canonical SmilesCCOP(OCC)OCC
IUPAC Nametriethyl phosphite
InChIKeyBDZBKCUKTQZUTL-UHFFFAOYSA-N
INCHI1S/C6H15O3P/c1-4-7-10(8-5-2)9-6-3/h4-6H2,1-3H3
Isomeric SMILES CCOP(OCC)OCC
WGK Germany 1
RTECS TH1130000
PubChem CID 31215
UN Number 2323
Packing Group III
Molecular Weight 166.16
Beilstein 956578

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganophosphorus compounds
ClassTrialkylphosphites
SubclassNot available
Intermediate Tree Nodes Not available
Direct ParentTrialkylphosphites
Alternative Parents Organic phosphites  Organooxygen compounds  Hydrocarbon derivatives  
Molecular FrameworkAliphatic acyclic compounds
Substituents Trialkylphosphite - Organic phosphite - Organic oxygen compound - Hydrocarbon derivative - Organooxygen compound - Aliphatic acyclic compound
DescriptionThis compound belongs to the class of organic compounds known as trialkylphosphites. These are organic compounds containing a phosphorous acid, which is tri-esterified with alkyl groups.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

28 results found

Lot NumberCertificate TypeDateItem
D2630441Certificate of AnalysisApr 18, 2026 T105731
D2630442Certificate of AnalysisApr 18, 2026 T105731
D2630476Certificate of AnalysisApr 18, 2026 T105731
D2630477Certificate of AnalysisApr 18, 2026 T105731
K2525809Certificate of AnalysisNov 04, 2025 T105731
K2525807Certificate of AnalysisNov 04, 2025 T105731
C2631080Certificate of AnalysisNov 04, 2025 T105731
K2525805Certificate of AnalysisNov 04, 2025 T105731
K2525804Certificate of AnalysisNov 04, 2025 T105731
F2512650Certificate of AnalysisJun 04, 2025 T105731
F2512649Certificate of AnalysisJun 04, 2025 T105731
F2512645Certificate of AnalysisJun 04, 2025 T105731
F2512644Certificate of AnalysisJun 04, 2025 T105731
C2414779Certificate of AnalysisFeb 29, 2024 T105731
C2414778Certificate of AnalysisFeb 29, 2024 T105731
J2421262Certificate of AnalysisMar 25, 2023 T105731
C2321542Certificate of AnalysisMar 25, 2023 T105731
L2420116Certificate of AnalysisMar 25, 2023 T105731
E2420007Certificate of AnalysisMar 25, 2023 T105731
E2408015Certificate of AnalysisMar 25, 2023 T105731
C2321573Certificate of AnalysisMar 25, 2023 T105731
E2530121Certificate of AnalysisMar 23, 2023 T105731
C2321622Certificate of AnalysisMar 23, 2023 T105731
C2321545Certificate of AnalysisMar 23, 2023 T105731
L2221084Certificate of AnalysisDec 13, 2022 T105731
L2221085Certificate of AnalysisDec 13, 2022 T105731
L2221087Certificate of AnalysisDec 13, 2022 T105731
L2221088Certificate of AnalysisDec 13, 2022 T105731

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Chemical and Physical Properties
SolubilityMiscible with alcohol and ether. Immiscible with water.
SensitivityAir Moisture Sensitive
Refractive Index1.413
Flash Point(°F)129.2 °F
Flash Point(°C)54 °C
Boil Point(°C)156-158 °C/1013 hPa
Melt Point(°C)-112°C
Molecular Weight166.160 g/mol
XLogP31.200
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count3
Rotatable Bond Count6
Exact Mass166.076 Da
Monoisotopic Mass166.076 Da
Topological Polar Surface Area27.700 Ų
Heavy Atom Count10
Formal Charge0
Complexity55.700
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Citations of This Product
References
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2. You Lei, Yuting Gao, Yi Xiao, Pengcheng Huang, Fang-Ying Wu.  (2023)  Cu2+-functionalized Zr-MOF triggers O-phenylendiamine oxidation for ultrasensitive ratiometric fluorescence detection of nerve agent simulant.  SENSORS AND ACTUATORS B-CHEMICAL,      [PMID:] [10.1016/j.snb.2023.134553]
3. Junqiao Jiang, Min Xiao, Sheng Huang, Dongmei Han, Shuanjin Wang, Yuezhong Meng.  (2023)  Phosphonic acid-imidazolium containing polymer ionomeric membranes derived from poly (phenylene oxide) towards boosting the performance of HT-PEM fuel cells.  JOURNAL OF MEMBRANE SCIENCE,      [PMID:] [10.1016/j.memsci.2023.121982]
4. Zetian Zhang, Hao Liu, Tiandu Dong, Yingjiao Deng, Yunxi Li, Chuanrui Lu, Wendi Jia, Zihan Meng, Mingzheng Zhou, Haolin Tang.  (2023)  Phosphonate poly(vinylbenzyl chloride)-Modified Sulfonated poly(aryl ether nitrile) for Blend Proton Exchange Membranes: Enhanced Mechanical and Electrochemical Properties.  Polymers,  15  (15): (3203).  [PMID:37571097] [10.3390/polym15153203]
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8. Xiao Fei, Wu Kun, Luo Fubin, Guo Yuyue, Zhang Shiheng, Du Xiangxiang, Zhu Qingqing, Lu Mangeng.  (2017)  An efficient phosphonate-based ionic liquid on flame retardancy and mechanical property of epoxy resin.  JOURNAL OF MATERIALS SCIENCE,  52  (24): (13992-14003).  [PMID:] [10.1007/s10853-017-1483-x]
9. Mingjing Zhu, Heejun Kim, Yu Jin Jang, Sungmin Park, Du Yeol Ryu, Kyungkon Kim, Ping Tang, Feng Qiu, Dong Ha Kim, Juan Peng.  (2016)  Toward high efficiency organic photovoltaic devices with enhanced thermal stability utilizing P3HT-b-P3PHT block copolymer additives.  Journal of Materials Chemistry A,  (47): (18432-18443).  [PMID:] [10.1039/C6TA08181A]
10. Qing Wan, Meiying Liu, Dazhuang Xu, Liucheng Mao, Hongye Huang, Peng Gao, Fengjie Deng, Xiaoyong Zhang, Yen Wei.  (2016)  Fabrication of amphiphilic fluorescent nanoparticles with an AIE feature via a one-pot clickable mercaptoacetic acid locking imine reaction: synthesis, self-assembly and bioimaging.  Polymer Chemistry,  (27): (4559-4566).  [PMID:] [10.1039/C6PY00851H]
11. Chan Wang, Miao Yang, Wenna Zhang, Xiong Su, Shutao Xu, Peng Tian, Zhongmin Liu.  (2016)  Organophosphorous surfactant-assistant synthesis of SAPO-34 molecular sieve with special morphology and improved MTO performance.  RSC Advances,  (53): (47864-47872).  [PMID:] [10.1039/C6RA06428K]
12. Nian Deng, Xufeng Ni, Zhiquan Shen.  (2015)  Syntheses and properties of amphiphilic poly (diethyl vinylphosphonate-co-2-chloroethyl methacrylate) copolymers.  DESIGNED MONOMERS AND POLYMERS,      [PMID:] [10.1080/15685551.2015.1041078]
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14. Tingting Zhang, Ning Xu, Wang Yin, Dongli Liu, Chang Liu, Meidong Lang.  (2024)  Energy-efficient frontal polymerization of poly(DCPD-co-TCPD) with improving thermomechanical properties and chemical resistance.  Materials Today Communications,      [PMID:] [10.1016/j.mtcomm.2024.109494]
15. Li Ting, Bai Yu, Zhang Chennan, Gao Yuanming, Ma Wen.  (2025)  Fabrication and Characterization of Magnesium-Doped Hydroxyapatite Coatings via Solution Precursor Plasma Spraying.  JOURNAL OF THERMAL SPRAY TECHNOLOGY,      [PMID:] [10.1007/s11666-025-01987-5]
16. Kuirong Feng, Pengyun Zhao, Lingxin Meng, Na Li, Fenglong Chen, Jiayin Wang, Jingmei Xu.  (2024)  Study on the Application Performance of Polymer Electrolyte Membrane Functionalized with Triethyl Phosphite-Modified Graphene Oxide in Fuel Cells.  ACS Applied Materials & Interfaces,      [PMID:38902850] [10.1021/acsami.4c06985]
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18. Song Zhao, Hongbo Jiang, Chengbin Gong, Wenjing Qi, Lianzhe Hu, Yan Zhang.  (2021)  Highly sensitive detection of Tb3+ and ATP based on a novel asymmetric anthracene derivative.  Analytical Methods,  14  (3): (306-311).  [PMID:34985467] [10.1039/D1AY01279G]
19. Yan Zhang, Xiaolong Xie, Song Zhao, Rui Jiang, Wenjing Qi, Lianzhe Hu.  (2025)  Detection of dissolved Ammonia and trinitrophenol using hydrogel tags doped with pyridine-functionalized AIEgens: A strategy for mitigating ammonium picrate hazards in explosive disposal.  SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,      [PMID:41412042] [10.1016/j.saa.2025.127345]
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