Tissue Embedding Rings — High Impact Polystyrene, Green, 500/Bag (258-4013-G10)
These green High Impact Polystyrene (HIPS) tissue embedding rings are designed to hold standard histology cassette bases in correct orientation within the embedding mold during paraffin infiltration at standard embedding center temperatures of 56–65°C. Supplied non-sterile in bags of 500, they are a high-volume consumable for surgical pathology cores and histopathology labs that rely on color-coded specimen tracking. The rubber-toughened HIPS matrix resists the thermal cycling, xylene exposure, and mechanical handling demands of routine histology workflows without the cracking or brittleness of standard polystyrene.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 258-4013-G10 |
| Product Type | Tissue Embedding Ring |
| Material | High Impact Polystyrene (HIPS) |
| Color | Green |
| Paraffin Compatibility | Compatible at standard embedding temperatures (56–65°C) |
| Xylene Compatibility | Compatible |
| Formalin Compatibility | Compatible (10% NBF) |
| Sterility | Non-Sterile |
| Pack Size | 500/Bag |
| BPA / Phthalates | BPA-free; no phthalate plasticizers |
| Country of Origin | USA |
Applications
- Surgical biopsy embedding — prostate needle core, cervical biopsy, skin punch, and similar specimens requiring precise cassette-base orientation in the mold
- Endoscopic biopsy processing — GI mucosal, esophageal, and gastric specimens where consistent block face geometry is critical for diagnostic-quality sections
- Color-coded specimen category designation — green rings support environmental monitoring, transplant biopsy, or renal specimen identification in multi-category histopathology programs
- High-throughput surgical pathology workflows processing large daily block volumes across multiple technologist stations
- Frozen section and routine histopathology embedding where paraffin block ribbon continuity and maximum diagnostic levels per block are priorities
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Paraffin wax (56–65°C) | Compatible |
| Xylene and xylene substitutes (HistoClear, Sub-X) | Compatible |
| Ethanol (all concentrations) / IPA | Compatible |
| 10% Neutral buffered formalin (NBF) | Compatible |
| Acetone | Not recommended |
| Chlorinated solvents | Not recommended |
Quality & Procurement
Made in USA, these Caplugs® Evergreen tissue embedding rings are produced from BPA-free, phthalate-free HIPS resin with green pigment compounded directly into the matrix — not a surface coating — ensuring permanent color retention through the full histology solvent sequence. LabSupplies.com is an authorized dealer of Caplugs® Evergreen consumables and ships from USA inventory, typically same business day for stocking items. The complete Caplugs® Evergreen tissue embedding ring color range — White (258-4010-W10), Pink (258-4011-P10), Blue (258-4012-B10), Green (258-4013-G10), and Yellow (258-4014-Y10) — is available from a single vendor, simplifying procurement for labs running multi-category color-coded embedding programs. Volume and institutional pricing is available for high-throughput surgical pathology facilities.
Frequently Asked Questions
Why are these rings made from HIPS rather than standard polystyrene?
High Impact Polystyrene incorporates a rubber-toughened matrix that withstands the thermal cycling, xylene exposure, and mechanical handling forces of routine histology embedding without the cracking or brittleness associated with standard PS. This makes HIPS the preferred material for tissue embedding rings that must remain structurally intact from cassette processing through block trimming.
Will the green color fade or wash out during xylene or formalin exposure?
No — the green pigment is compounded directly into the HIPS matrix rather than applied as a surface coating, so color retention is permanent throughout the histology solvent sequence including xylene, ethanol, and 10% NBF formalin.
Are these embedding rings sterile?
No — they are supplied non-sterile, which is standard for tissue embedding rings used in paraffin histology workflows.
Do these rings fit standard histology cassette bases from other manufacturers?
These rings are designed to fit standard histology cassette bases and are intended for use in routine paraffin embedding workflows. If your lab uses a non-standard cassette format, verify dimensional compatibility before ordering in bulk.