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Ionizable lipids / CICL-1 (L829)
CICL-1 (L829) chemical structure
Product imageResearch use only
CAT. NO. DC99010Featured

CICL-1 (L829)

Ionizable lipid for LNP and nucleic-acid delivery research.

Research highlights
In vivo CD8+ T-cell engineeringAnti-CD19 and anti-CD20 CAR mRNARapid B-cell depletionMouse and nonhuman-primate studies
Derived from the cited study; not a product specification or performance guarantee.

Pack size & price

USD
TotalUS$600
We match the best price and quality on market.
Ships from ShanghaiIce-pack transportPure lipid recommended
Product overview

Description & Application

CICL-1, identified in the cited study as Lipid 829 (L829), is an ionizable lipid used in targeted lipid nanoparticles for in vivo delivery of CAR mRNA to T cells. CD8-targeted L829 tLNPs preferentially engineered CD8-positive T cells in the reported models, produced rapid B-cell depletion, and controlled a humanized leukemia xenograft. In cynomolgus monkeys, anti-CD20 CAR mRNA tLNPs produced deep peripheral and tissue B-cell depletion, followed by repopulation dominated by naïve B cells; the authors described this finding as suggestive of immune reset. The supplied main article does not include Supplementary Table S1, so the complete five-lipid composition and N/P ratio are not presented as verified formulation values. All performance statements below are literature-reported study results, not product specifications or guaranteed outcomes.

CAS No.Not available
Chemical NameCICL-1 (L829)
Synonyms​​L-829, ​​L 829, Capstan-lipid-CICL-1, Capstanlipid CICL1, CICL1, CICL 1, CICL-1, Lipid 829, L-829, L 829, Compound A-11, DC60860
SMILESCCCCCCCCC(=O)OCC(COC(=O)CCCCCCCC)CC(=O)OCCN(CCOC(=O)CC(COC(=O)CCCCCCCC)COC(=O)CCCCCCCC)C(=O)OCCN(C)C
FormulaC55H100O14N2
M.Wt1,013.40
Purity>98%
StoragePure form: −20 °C, 1 year; In solvent: −80 °C, 6 months; −20 °C, 1 month. Sealed and protected from light.
Shipping conditionShips from Shanghai. Pure lipid is stable during ice-pack transport.
PublicationHunter TL, Bao Y, Zhang Y, et al. In vivo CAR T cell generation to treat cancer and autoimmune disease. Science. 2025;388(6753):1311-1317.

Literature-reported formulation composition

Componentmol%Role
L829 (CICL-1)Not reportedIonizable lipid
Anti-CD8 targeting-moiety lipid conjugate (lipid identity not reported in supplied main article)Not reportedTargeting-lipid conjugate
Three additional lipid components (identities not reported in supplied main article)Not reportedAdditional lipid components
Reported totalNot reportedSource values retained
Formulation calculator unavailable. The supplied article does not report the complete molar composition, so a formulation weight calculation is not available. Obtain and verify the complete composition and component molecular weights before planning component quantities.
Not reported in the cited article
Not reported in the supplied main article
Not reported in the supplied main article; formulation details are assigned to Supplementary Table S1
Anti-CD20 CAR mRNA
Intravenous injection
0.1-2.0 mg/kg every 72 h for three doses
Cynomolgus monkeys; 22 animals across three studies
Not reported in the supplied main article; Materials and Methods and Supplementary Table S1 were not included in the uploaded PDF

Literature-reported performance for the cited formulation

Literature-reportedSharp decline by 6 h; near-undetectable by 24 h6 and 24 h after first IV dose · After the first CD8-L829-tLNP-CD20 doseFigure 4B and main text, Science p. 1316
Literature-reportedUp to 85%After the third IV dose · Minimal CAR expression on CD4+ T cellsFigure 4C and main text, Science p. 1316
Literature-reportedUp to 95%After the third IV dose · Dose-dependent expression was reportedFigure 4C and main text, Science p. 1316
Literature-reportedRepopulation began around day 21 and approached baseline by day 35Recovery follow-up after 1-1.5 mg/kg dosing · Repopulating blood and tissue B cells were predominantly naïveFigure 5, Figure S12 and main text, Science p. 1316

Additional reported findings

Humanized-mouse leukemia study

At 30 µg, four of five mice showed near-complete tumor clearance two days after the first dose, and all five did so three days after the second dose.

CD8-L829-tLNP-CD19; IV 30 µg; twice weekly for five doses; human PBMC plus Nalm6 xenograft · Figure 3G and main text, Science p. 1315
Reduced off-target liver delivery and rapid clearance

The study reported lower liver and spleen luciferase expression with untargeted L829 LNP than with the ALC-0315 benchmark, and rapid L829 clearance from mouse liver while ALC-0315 remained elevated for at least seven days.

Luciferase mRNA and LC-MS studies; WT C57BL/6 mice · Figure 1B,C and main text, Science pp. 1311-1312
Reported tolerability and safety boundary

Rat CD5-L829 tLNP was reported as tolerated up to 5 mg/kg without adverse observations, and a single 3 mg/kg IV dose was reported as safely administered in cynomolgus monkeys. In the repeat-dose anti-CD20 study, however, one monkey in the 1.5 mg/kg group developed a serious immune-effector-cell-associated event 72 h after the third dose and was euthanized.

Study-specific targeted L829 tLNPs; rat and cynomolgus-monkey experiments · Figure 1D,E; main text, Science pp. 1311 and 1316
Literature Data DisclaimerAll formulation parameters and performance values shown in this section are derived from the cited publication and are provided for reference only. These results were obtained using the specific materials, formulation process, cargo, dose, analytical method, model and administration route described in that study. Unless otherwise stated, the data were not generated or independently verified by DC Chemicals. DC Chemicals supplies the lipid compound only and does not guarantee that customers will reproduce the reported LNP properties or biological performance.

The administration route shown above was used in the cited study and is not a clinical-use instruction or recommendation by DC Chemicals.
Cited literature for this formulation and performance datasetHunter TL, Bao Y, Zhang Y, et al. In vivo CAR T cell generation to treat cancer and autoimmune disease. Science. 2025;388(6753):1311-1317. DOI: 10.1126/science.ads8473
Identity and performance: supplied Science main article, Figures 1 and 3-5. The complete five-lipid composition, preparation method and particle-characterization details are assigned by the article to Supplementary Table S1 and Materials and Methods, which were not present in the uploaded PDF.
Laboratory planning

Solution Calculators

The product molecular weight is prefilled when available and remains editable. Confirm solvent compatibility and solubility before preparation.

Mass = concentration × volume × molecular weight
Enter any three values to calculate the fourth.
C₁V₁ = C₂V₂
Enter any three values to calculate the fourth.
Preparing stock solutions

Quick preparation table

Solvent volumes update from the molecular weight above.

Mass1 mM5 mM10 mM
10 mg9.8678 mL1.9736 mL986.78 μL
25 mg24.6694 mL4.9339 mL2.4669 mL
50 mg49.3389 mL9.8678 mL4.9339 mL
100 mg98.6777 mL19.7355 mL9.8678 mL
250 mg246.6943 mL49.3389 mL24.6694 mL

Need a different pack size or technical document?

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Handling guidance

Shipping, storage and sampling

How is the lipid shipped, and how should I store it?
We generally ship the neat (undissolved) lipid compound rather than an ethanol solution. The neat lipid is stable during transport with ice packs, and shipments originate from Shanghai. Pure form: store at −20 °C for up to 1 year. In solvent: store at −80 °C for up to 6 months or at −20 °C for up to 1 month. Keep sealed and protected from light. Avoid repeated thaw cycles for best results.
Pure lipid or solution — which should I choose?
Pure lipid is generally more stable during shipping and storage, so we usually recommend the pure form. A solution in ethanol or chloroform can be supplied when required by your workflow. Tell us the intended application, solvent and target concentration so the most suitable format can be confirmed.
How should I measure a small amount of oily or viscous lipid?
Ionizable lipids are often oily liquids or viscous semisolids, so material can be lost during repeated weighing or transfer. For a small pack, dissolve the entire quantity and aliquot it volumetrically. For example, add 1 mL ethanol to 25 mg lipid to prepare a 25 mg/mL stock, then use a pipette to withdraw the required amount. For quantities above 100 mg, direct weighing with an analytical balance may be more practical. Always confirm solvent compatibility and solubility first.
Can you support formulation optimization and scale-up?
Yes. Share the RNA cargo, target tissue, administration route, formulation method and assay plan. Our team can discuss starting molar ratios, N/P ratio and scale-up requirements for research workflows.