High Purity 99.9% Calcium Sulfide (CaS) for Phosphor Host Matrix and H₂S-Generating Sulfidation Reagent

3N Calcium sulfide (CaS) is an inorganic alkaline earth sulfide with a cubic rock-salt crystal structure Use for improved optical quality, as a phosphor host matrix, H₂S-generating sulfidation reaget
 
 Specification of High purity 3N Calcium Sulfide(CaS) CAS:20548-54-3

Calcium sulfide (CaS) is an inorganic alkaline earth sulfide with a cubic rock-salt crystal structure. with ultra-high purity compositions specifically marketed for improved optical quality and scientific standards. CaS functions as a phosphor host matrix, an H₂S-generating sulfidation reagent, and a precursor for luminescent materials.

Applications of High purity 3N Calcium Sulfide(CaS) CAS:20548-54-3

1. Long-Persistent Red Phosphors for Emergency Signage

Ce³⁺-codoped CaS:Eu²⁺,Tm³⁺ phosphors are specifically indicated for applications requiring extended afterglow duration without external power. The 22% longer persistence time and 20% brightness enhancement  directly translate to extended visibility in emergency exit signs, watch dials, and low-light display components. Procurement of Ce³⁺-containing CaS phosphor formulations rather than binary CaS:Eu²⁺ or undoped material provides quantifiable performance advantages in applications where afterglow duration is a critical specification.

2. Controlled H₂S Release for Acidic Wastewater Treatment

CaS-organosilicon complex (CaS-OSCS) is indicated for sulfide precipitation treatment of strongly acidic wastewater containing Cu(II) and As(III). The 10-fold extension of H₂S release duration (from 5 min to 50 min)  eliminates hazardous H₂S gas escape while achieving 99% precipitation efficiency. The 30% reduction in sulfuration reagent dosage provides direct operational cost savings compared to unmodified CaS treatment. This formulation is particularly suited for facilities facing stringent H₂S emission regulations or requiring selective copper recovery from mixed-metal streams.

3. High-Purity Feedstock for Optoelectronics

Applications requiring consistent optical performance—including phosphor synthesis, scintillator fabrication, and luminescent paint formulation—require high-purity CaS feedstock. Commercial availability of 99.9% (3N) and 99.999% (5N) grades [3] enables procurement of material with controlled trace metal profiles (e.g., Sr < 500 ppm specification ) that minimizes impurity-mediated luminescence quenching. Ultra-high purity compositions specifically improve optical quality and serve as scientific standards . Procurement of lower-purity technical grade CaS (~80%) is contraindicated for these applications due to uncontrolled impurity profiles that degrade emission intensity and color purity.

4. Solid-State H₂S Donor for Preclinical Research

CaS nanoparticles serve as an intrinsically slow-releasing H₂S donor platform for preclinical studies investigating gasotransmitter-mediated therapeutic effects. The sustained H₂S release profile (demonstrated over 48 hours in physiological conditions) provides prolonged exposure that better matches the temporal dynamics of post-ischemic injury compared to bolus-releasing soluble sulfide salts. The superior chemical stability of CaS relative to NaHS  enables formulation approaches that are impractical with highly reactive alternative donors, supporting applications in experimental stroke models and cardiovascular research where controlled, sustained H₂S delivery is required.

FAQ

Q1: What is your regular lead time for sample and official order?

A1: Sample lead time 5-7 days. Official order lead time 14-21 days.

Q2: What is your MOQ?

A2: MOQ usually is 1kg.

Q3: How you control product quality?

A3: From raw material inspection, dupro inspection to final product inspection are executed strictly.

Q4: What is your warranty policy?

A4: We will send you a new batch if there is any quality issue during warranty time

Q5: Do you refund if customer receive defective product and do not accept replacement?

A5: Yes