Blue Light Absorber ChemWhat 1499437 CAS 1877301-52-4

• Iden­ti­fi­ca­tion
• Prop­er­ties
• Safe­ty Data
• Spec­i­fi­ca­tions & Oth­er Information
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Iden­ti­fi­ca­tion

CAS Number

1877301-52-4

Name

2-(tert-Butyl)-4-methyl-6-(5-(p-tolylthio)-2H-benzo[d][1,2,3]triazol-2-yl)phenol

Syn­onyms

5-(4-methyl-phenylthio)-2-(2-hydroxy-3-tert-butyl-5-methylphenyl)-2H-benzotriazole

SMILES

CC1=CC(C(C)(C)O)=C(C=C1)n2nnc3cc(SC4=CC=C(C)C=C4)ccc23

Std­InChI

InChI=1S/C24H23N3OS/c1-16-7-9-17(10-8-16)29-21-12-11-20-22(13-21)27-25-26(20)23-14-18(2)15-19(24(3,4)28)6-5-23/h5-15,28H,1-4H3

Std­InChIKey

PAKNCPQVD­CBQJQ-UHF­F­­FAOYSA-N

Mol­e­c­u­lar Formula

C24H25N3OS

Mol­e­c­u­lar Weight

403.548

Prop­er­ties

Appear­ance

Light yel­low crys­talline powder

Melt­ing point

135.0 ~ 145.0℃

Safe­ty Data

RIDADR 

NONH for all modes of transport

Spec­i­fi­ca­tions and Oth­er Infor­ma­tion of Our Blue Light Absorber ChemWhat 1499437 CAS 1877301-52-4

Intro­duc­tion

Blue Light Absorber ChemWhat 1499437 is a high­ly effi­cient, red-shift­ed ben­­zo­tri­a­­zole-based light absorber. Derived from the struc­tur­al back­bone of the clas­sic prod­uct UV-326, it has been opti­mized through a con­ju­ga­tion mod­i­fi­ca­tion involv­ing the intro­duc­tion of a p-tolylthio group at the 5-position.

Prop­er­ties

1. Red-Shift­ed, Nar­row-Band Absorp­tion & Sharp Cut-Off
   Com­pared with con­ven­tion­al ben­zo­tri­a­zole absorbers (λmax ~340 – 350 nm), ChemWhat 1499437 exhibits a sig­nif­i­cant red shift with an absorp­tion max­i­mum around 365 nm. The 5-posi­­tion thioether mod­i­fi­ca­tion pro­vides an excep­tion­al­ly sharp absorp­tion pro­file : spec­tral scan­ning shows 0% trans­mit­tance at 390 nm and near­ly 100% trans­mit­tance at 430 nm. This enables pre­cise block­ing of harm­ful high-ener­­gy vis­i­ble blue light, espe­cial­ly with­in the 400 – 420 nm range.
2. High Vis­i­ble Light Trans­paren­cy & Low Yel­low­ing
   While deliv­er­ing excel­lent UV and blue-light shield­ing per­for­mance, poly­mer sub­strates can still main­tain a total light trans­mit­tance of ≥87%. Unlike con­ven­tion­al red-shift­ed absorbers, ChemWhat 1499437 rapid­ly becomes ful­ly trans­par­ent beyond 430 nm, result­ing in extreme­ly low back­ground col­oration and meet­ing strin­gent opti­cal require­ments for low Yel­low­ing Index (Y.I.).
3. High Ther­mal Sta­bil­i­ty & Extreme­ly Low Volatil­i­ty
   The 5% weight-loss tem­per­a­ture (TGA) exceeds 280°C, mak­ing it high­ly suit­able for high-tem­per­a­­ture melt pro­cess­ing appli­ca­tions such as PC and PET extru­sion, injec­tion mold­ing, and film stretch­ing. Its high­er mol­e­c­u­lar weight com­bined with the unique aryl thioether struc­ture effec­tive­ly sup­press­es sub­li­ma­tion, sig­nif­i­cant­ly reduc­ing mold deposits, die build-up, and vac­u­um line block­age dur­ing production.
4. Excel­lent Com­pat­i­bil­i­ty & Sol­u­bil­i­ty
   The opti­mized steric hin­drance and aryl thioether struc­ture pro­vide out­stand­ing sol­u­bil­i­ty and com­pat­i­bil­i­ty in a wide range of polar and non-polar resins, includ­ing PC, PMMA, PET, and opti­cal monomer sys­tems such as CR-39 and MR series mate­ri­als. Long-term use helps pre­vent pre­cip­i­ta­tion, migra­tion, haze increase, or sur­face whitening.
5. Out­stand­ing Weath­er Resis­tance (High Light Fast­ness)
   The robust ben­zo­tri­a­zole back­bone enables effi­cient ener­gy dis­si­pa­tion through the Excit­ed-State Intramol­e­c­u­lar Pro­ton Trans­fer (ESIPT) mech­a­nism, sig­nif­i­cant­ly delay­ing sub­strate yel­low­ing, degra­da­tion, and gloss loss under pro­longed light exposure.

Known Appli­ca­tion

Wide­ly used in high-end opti­cal and elec­tron­ic mate­ri­als requir­ing strict UV and high-ener­­gy blue-light block­ing performance :

1. Opti­cal Lens­es
   Blue-light-block­­ing eye­wear, func­tion­al resin lens­es (CR-39, MR-8 sys­tems), and con­tact lens­es.
   Rec­om­mend­ed dosage : 0.1% – 0.8%
2. Dis­play Pro­tec­tion Films
   PET screen pro­tec­tive films, opti­cal clear adhe­sives (OCA), and polar­iz­er pro­tec­tive lay­ers for smart­phones and dis­play pan­els.
   Rec­om­mend­ed dosage : 0.5% – 2.0%
3. Func­tion­al Coat­ings & Win­dow Films
   Pre­mi­um auto­mo­tive win­dow films, archi­tec­tur­al win­dow films, and high-end UV-cur­able func­tion­al coat­ings.
   Rec­om­mend­ed dosage : 1.0% – 3.0%

Iden­ti­fi­ca­tion Methods

HNMR, HPLC

Puri­ty

98.5% min

Water

≤0.2%

Volatile Mat­ter

≤ 1.0%

Trans­mit­tance

390 nm : 0.0% (Com­plete­ly blocked)
430 nm : ≥98.0% (Almost com­plete­ly transparent)

Shelf Life

2 years

Pack­age

25 kg / Fiber drum or car­ton, lined with dou­ble-lay­er PE plas­tic bags.

Stor­age

Under room tem­per­a­ture away from light

Gen­er­al View of Documents

Links

This prod­uct is devel­oped by our R&D com­pa­ny Warshel Chem­i­cal Ltd (https://​www​.warshel​.com/).

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