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Gerson G78 Multi-Gas P100 Cartridge for Half and Full Face Respirators
$24.99
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WC Safety participates in the Amazon Services LLC Associates Program. Outbound Amazon links are affiliate links. We accept no manufacturer payment, sponsorship, or product samples. This content is not medical, legal, or regulatory advice. Safety equipment selection is governed by applicable OSHA standards and your facility's safety program.
WC Safety participates in the Amazon Services LLC Associates Program. Outbound Amazon links are affiliate links. We accept no manufacturer payment, sponsorship, or product samples. This content is not medical, legal, or regulatory advice. Safety equipment selection is governed by applicable OSHA standards and your facility's safety program.
Gerson G78 Multi-Gas P100 Cartridge — Half and Full Face Respirators
The Gerson G78 is a broad-spectrum multi-gas combination cartridge with integrated P100 particulate filtration, designed for use with Gerson half-face respirators and Gerson full-face respirators. The G78's low-profile, swept-back cartridge design reduces obstruction to the wearer's field of view and provides clearance for eyewear and goggles — a practical advantage over bulkier cylindrical cartridge designs in environments where visual precision matters. NIOSH approval covers the widest multi-hazard range available in a single cartridge: organic vapors (OV), ammonia (NH3), chlorine dioxide (ClO2), chlorine (Cl2), formaldehyde (HCHO), hydrogen chloride (HCl), hydrogen fluoride (HF), hydrogen sulfide (H2S), methylamine, sulfur dioxide (SO2), and all particulates at P100 (99.97%) efficiency. Workers in chemical manufacturing, wastewater, laboratory, pharmaceutical, metal finishing, or multi-hazard industrial environments can address both gas/vapor and particulate hazards with a single cartridge selection. Browse the full respirator filters and cartridges catalog at WC Safety.
Vendor: Gerson | Model: G78 | ASIN: B0CDNM43CW | UPC: 044585000208
NIOSH Approvals — Gases, Vapors, and Particulates
| Substance | OSHA PEL / NIOSH REL | Typical Source |
|---|---|---|
| Organic Vapors (OV) | Varies by solvent — see SDS | Solvents, paints, adhesives, coatings, cleaning agents, gasoline vapors |
| Ammonia (NH3) | OSHA PEL: 50 ppm (TWA) | Refrigeration, fertilizer production, cleaning products, livestock facilities |
| Chlorine Dioxide (ClO2) | OSHA PEL: 0.1 ppm (C) | Water treatment, pulp bleaching, food processing sanitation |
| Chlorine (Cl2) | OSHA PEL: 1 ppm (C) | Water treatment, bleach production, chemical manufacturing, paper mills |
| Formaldehyde (HCHO) | OSHA PEL: 0.75 ppm (TWA), 2 ppm (STEL) | Healthcare, mortuary, laboratory, wood products, resin manufacturing |
| Hydrogen Chloride (HCl) | OSHA PEL: 5 ppm (C) | Chemical manufacturing, metal pickling, semiconductor fabrication |
| Hydrogen Fluoride (HF) | OSHA PEL: 3 ppm (TWA) | Semiconductor etching, glass frosting, petroleum alkylation, aluminum production |
| Hydrogen Sulfide (H2S) | OSHA PEL: 20 ppm (C) | Wastewater treatment, oil and gas, tanneries, confined space entry |
| Methylamine | OSHA PEL: 10 ppm (TWA) | Pharmaceutical synthesis, chemical manufacturing, dye production |
| Sulfur Dioxide (SO2) | OSHA PEL: 5 ppm (C) | Combustion, metal smelting, paper pulp operations, refrigeration |
| Particulates (P100) | 99.97% efficiency, oil-proof | Welding fume, silica, lead, mists, metal oxide aerosols — all oil and non-oil particulates |
The G78 provides protection only up to the APF of the facepiece: APF 10 for a half-face respirator, APF 50 for a full-face respirator. For concentrations above the facepiece APF limit, a higher-protection device (PAPR, SCBA) is required. Always confirm the cartridge approval applies to the specific substance and concentration — consult the SDS and your industrial hygienist.
Key Features
| Broad Multi-Gas Coverage in One Cartridge | Ten gas/vapor NIOSH approvals plus P100 particulate — all in a single cartridge body. Workers in environments with complex or variable hazard profiles no longer need to stock multiple cartridge types or swap cartridges between tasks. For multi-gas industrial environments (chemical plants, wastewater, labs, pharmaceutical), the G78 simplifies inventory and eliminates the selection error risk of choosing the wrong single-gas cartridge for the current task. |
| Low-Profile Swept-Back Design | The G78's swept-back cartridge profile angles back along the jawline rather than projecting straight outward from the facepiece. This reduces downward field-of-view obstruction and provides clearance for safety glasses, goggles, and certain welding visors or grinding shields. Particularly relevant for chemical lab work (reading labels, working at bench), welding on coated substrates (viewing the joint), and any precision task where blind spots created by bulky cartridges impair safety or productivity. |
| Half-Face and Full-Face Compatible | The G78 fits both Gerson half-face respirators and Gerson full-face respirators. Operations running both half and full face facepieces for different tasks or exposure levels can consolidate to a single cartridge SKU. The protection level changes with the facepiece (APF 10 for half-mask, APF 50 for full-face) while the cartridge remains the same. |
| P100 Particulate + Multi-Gas Combination | Integrates activated carbon gas/vapor adsorption with P100 particulate filtration (99.97% oil-proof efficiency) in a single cartridge. Workers in environments with combined hazards — welding on coated metals (particulate + OV), chemical manufacturing with aerosol generation (gas + mist), metal finishing (acid gas + metal fume) — get comprehensive protection without separate filter components stacked on the cartridge. |
Service Life and Change-Out Schedule
OSHA 29 CFR 1910.134(d)(3)(iii) requires OV cartridges without an End-of-Service-Life Indicator (ESLI) to be replaced on a documented change-out schedule. If the G78 does not include an ESLI, establish a schedule using the cartridge manufacturer's service life estimation guidance, incorporating site-specific contaminant concentration, temperature, relative humidity, and breathing rate data. Document the schedule in the written respiratory protection program per OSHA 1910.134(c)(1)(viii).
- OV / gas component: Replace per documented change-out schedule based on service life estimation. Replace immediately if odor or irritation is detected through the facepiece (sensory detection alone is a backup indicator, not the primary method under OSHA 1910.134).
- P100 particulate component: No fixed time-based service life for dry particulate loading. Replace when breathing resistance increases noticeably, when the filter is physically damaged, or when it becomes wetted by liquid.
- Both cartridges simultaneously: Always replace both cartridges at the same time. Using a new cartridge alongside a partially loaded one creates asymmetric airflow resistance across the facepiece.
Frequently Asked Questions
What Gerson respirators is the G78 compatible with?
The G78 is compatible with all Gerson cartridge-style half-face respirators and full-face respirators that use Gerson's standard cartridge bayonet connection. Always confirm compatibility with your specific Gerson facepiece model against the manufacturer's published compatibility data before use in a compliance respiratory protection program.
Is the G78 approved for hydrogen sulfide (H2S) in confined spaces?
The G78 is NIOSH approved for H2S. However, it may only be used in confined space atmospheres that are: (1) confirmed non-IDLH (H2S IDLH is 100 ppm), (2) oxygen-sufficient (≥19.5% O2), and (3) within the APF of the facepiece. Confined space atmospheres involving unknown concentrations, confirmed or suspected IDLH conditions, or oxygen deficiency require supplied-air respirators (SARs) or SCBA — air-purifying respirators are prohibited in those conditions under OSHA 29 CFR 1910.146. Atmospheric testing prior to entry is required before any confined space entry.
Is the G78 approved for formaldehyde under OSHA's formaldehyde standard?
Yes — NIOSH approval includes formaldehyde (HCHO). OSHA's formaldehyde standard (29 CFR 1910.1048) requires respiratory protection when concentrations exceed the action level (0.5 ppm TWA) or STEL (2 ppm) and engineering controls are insufficient. At concentrations between the action level and PEL (0.75 ppm TWA), a half-mask APR with a formaldehyde-approved cartridge is acceptable. Above the PEL or STEL, consult 1910.1048 Table Z-2 and Appendix E for specific APF requirements. The G78 with a full-face facepiece (APF 50) extends the protection range compared to a half-mask (APF 10).
Does the G78 require a documented change-out schedule?
Yes, for the OV and gas components. OSHA 1910.134(d)(3)(iii) requires cartridges without an ESLI to be replaced on a schedule established before first use. The schedule must be based on worst-case conditions using service life data for each specific substance present. Document the schedule in your written respiratory protection program. If Gerson provides service life estimation data for the G78, use that as your starting point alongside site measurement data. Sensory detection (odor, taste, irritation through the mask) warrants immediate replacement but cannot be the sole change-out criterion.
What is the APF difference between using the G78 with a half-mask vs. full-face respirator?
The Assigned Protection Factor (APF) depends on the facepiece, not the cartridge. With a Gerson half-face respirator, the G78 system has an APF of 10 — meaning it is appropriate for concentrations up to 10 times the PEL. With a Gerson full-face respirator, the same G78 cartridge provides an APF of 50 — appropriate for concentrations up to 50 times the PEL. For higher-hazard environments where substance concentrations exceed 10x PEL, upgrading to the full-face facepiece (same G78 cartridge) is often the simplest path to compliant protection without changing cartridge inventory.
How does the G78's swept-back design improve usability?
Standard cylindrical cartridges project outward from the facepiece, which obstructs the wearer's downward field of view and increases the chance of contact with work surfaces or equipment. The G78's swept-back profile angles the cartridge body backward and closer to the face outline, reducing the blind spot below the chin and providing clearance for safety glasses and goggles. For precision tasks — lab bench work, fine welding, electronics assembly, chemical sampling — this improved sightline is operationally significant. The swept-back design also reduces the overall width profile, which can be important in tight spaces and when passing through doorways or around equipment.
Can the G78 be used for chlorine gas in water treatment?
The G78 is NIOSH approved for chlorine (Cl2) and chlorine dioxide (ClO2) — both common water treatment chemical hazards. OSHA PEL for chlorine is 1 ppm (ceiling). For chlorination and dechlorination operations where concentrations are confirmed below 10x PEL (10 ppm), a half-mask APR with the G78 is appropriate. For chlorine gas leak response, emergency entry, or any unknown-concentration scenario, SCBA is required. Always verify atmospheric concentrations with direct-reading instrumentation before APR use and conduct the fit check protocol required by your respiratory protection program per OSHA 1910.134. Browse the respirator filters and cartridges collection for the full range of options.
Brand / Vendor
Gerson
Model / SKU
G78
Product Type
Respirator Cartridge
Price
$24.99 (Amazon)
Rating
4.8 / 5 — reviews
Availability
✓ In Stock on Amazon
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