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Merck

900889

Lithium phenyl-2,4,6-trimethylbenzoylphosphinate

≥95%

Lithium phenyl-2,4,6-trimethylbenzoylphosphinate

Synonym(s):

LAP

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Estimated to ship onDecember 22, 2025Details

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About This Item

Empirical Formula (Hill Notation):
C16H16LiO3P
CAS Number:
85073-19-4
Molecular Weight:
294.21
MDL number:
MFCD29472537
UNSPSC Code:
12352128
NACRES:
NA.23

Key Documents

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Product Name

Lithium phenyl-2,4,6-trimethylbenzoylphosphinate, ≥95%

SMILES string

CC1=C(C(P(C2=CC=CC=C2)(O[Li])=O)=O)C(C)=CC(C)=C1

assay

≥95%

form

crystalline powder

color

white to off-white

storage temp.

2-8°C

Quality Level

100

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Show Differences

1 of 4

This Item
199877323403L3408
Lithium phenyl-2,4,6-trimethylbenzoylphosphinate ≥95%

Sigma-Aldrich

900889

Lithium phenyl-2,4,6-trimethylbenzoylphosphinate

Lithium aluminum hydride powder, reagent grade, 95%

Sigma-Aldrich

199877

Lithium aluminum hydride

Lithium aluminum hydride pellets, reagent grade, 95%

Sigma-Aldrich

323403

Lithium aluminum hydride

Transforming Growth Factor-β1 Latency Associated Peptide human ≥97% (SDS-PAGE), recombinant, expressed in Sf21 cells, lyophilized powder, suitable for cell culture

Sigma-Aldrich

L3408

Transforming Growth Factor-β1 Latency Associated Peptide human

assay

≥95%

assay

95%

assay

95%

assay

≥97% (SDS-PAGE)

storage temp.

2-8°C

storage temp.

-

storage temp.

-

storage temp.

−20°C

form

crystalline powder

form

powder

form

pellets

form

lyophilized powder

color

white to off-white

color

-

color

-

color

-

Quality Level

100

Quality Level

200

Quality Level

200

Quality Level

100

Application

Lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP) is a water soluble, cytocompatible, Type I photoinitiator for use in the polymerization of hydrogels or other polymeric materials. This photoinitator is preferred over Irgacure 2959 for biological applications due to its increased water solubility, increased polymerization rates with 365 nm light, and absorbance at 400 nm allowing for polymerization with visible light. The improved polymerization kinetics enable cell encapsualation at reduced initiator concentration and longer wavelength light, which has been shown to reduce initiator toxicity and increase cell viability.

Features and Benefits

  • Superior water solubility
  • Biocompatible
  • Sensitiveto visible light

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
WXBF7790V
WXBF7089V
WXBF6657V
WXBF6419V
WXBF5882V

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Joshua D McCall et al.
Biomacromolecules, 13(8), 2410-2417 (2012-06-30)
Photoinitiated polymerization remains a robust method for fabrication of hydrogels, as these reactions allow facile spatial and temporal control of gelation and high compatibility for encapsulation of cells and biologics. The chain-growth reaction of macromolecular monomers, such as acrylated PEG
Tiffany Zhang et al.
Scientific reports, 10(1), 15796-15796 (2020-09-27)
Inspired by the interesting natural antimicrobial properties of honey, biohybrid composite materials containing a low-fouling polymer hydrogel network and an encapsulated antimicrobial peroxide-producing enzyme have been developed. These synergistically combine both passive and active mechanisms for reducing microbial bacterial colonization.
Andrew C Daly et al.
Nature communications, 12(1), 753-753 (2021-02-04)
Cellular models are needed to study human development and disease in vitro, and to screen drugs for toxicity and efficacy. Current approaches are limited in the engineering of functional tissue models with requisite cell densities and heterogeneity to appropriately model
Zhiguang Qiao et al.
Biomaterials, 266, 120385-120385 (2020-10-30)
Despite significant advances in osteochondral tissue engineering, it remains challenging to successfully reconstruct native-like complex tissues organized in three-dimension with spatially varying compositional, structural and functional properties. In this contribution, inspired by the gradients in extracellular matrix (ECM) composition and
Kavin Kowsari et al.
iScience, 24(11), 103372-103372 (2021-11-27)
To address current unmet needs in terms of scalability and material biocompatibility for future photocrosslinking-based additive manufacturing technologies, emergent platform designs are in inexorable demand. In particular, a shift from the present use of cell-damaging UV light sources in light-based
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Tissue Engineering

Tissue engineering fabricates tissues cultures from scaffolds, living cells, and biologically active molecules by simulating the microenvironment of the body to repair or replace damaged tissue.

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Questions

1–5 of 5 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf

      Helpful?

  2. May I know the exact content for this product? (Purity(HPLC) is about the area ratio, right?)

    1 answer

    1. The purity value of this product is approximately 99%, depending on the lot number. The percentage purity is calculated by High-Performance Liquid Chromatography (HPLC) using area ratios obtained from the chromatograms.

      Helpful?

  3. What is the quantum yield of this photoinitiator for 365 nm light?

    1 answer

    1. The quantum yield of this product at 365 nm is not tested. Here is a reference paper that reported the quantum yield of 0.35: https://onlinelibrary.wiley.com/doi/10.1002/macp.1991.021921010?msockid=09c4269466ab65c01be132a5675564f9

      Helpful?

  4. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  5. Hello, I would like to know what is the minimum power to activate LAP?

    1 answer

    1. Minimum activation levels are not determined for this product. As per the product information, this compound demonstrates increased polymerization rates with 365 nm light, and absorbance at 400 nm allowing for polymerization with visible light. See the link below for a publication that may be helpful.
      https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7408440/

      Helpful?

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