Desiccants for Apparel Export to US/EU — OEKO-TEX and REACH Compliance

Why Do Apparel Exports to the US/EU Need Desiccants?

Mold is the primary risk for textiles inside shipping containers. Aspergillus niger and Penicillium chrysogenum thrive at RH above 70% and temperatures of 20–35 °C. During ocean transit from Vietnam to the US (15–18 days across the Pacific) or EU (28–32 days via the Suez Canal), temperatures inside the container fluctuate significantly, especially while passing through tropical waters. "Container rain" — condensation dripping from the container ceiling onto cargo — is a documented risk for stacked apparel cartons.

Impact by material type:

• Genuine and synthetic leather (shoes, bags): mold leaves permanent white stains and odor once spores penetrate the collagen structure.
• Wool and cashmere: sustained humidity activates enzymes in protein fibers, causing pilling, shrinkage, and loss of softness.
• Thick cotton (denim, jackets): dyes — especially indigo — bleed under prolonged humidity exposure.
• Polyester and nylon: less susceptible to mold, but humidity reacts with fabric finishing chemicals (softeners, flame retardants), generating unwanted odors.

US and EU importers increasingly require a Certificate of Conformance from all packaging accessory suppliers, including desiccants. Mold rejection at the destination port triggers destruction costs, insurance claims, and reputational damage — far exceeding the cost of desiccant prevention.

See also: CEMACO Sai Gon silica gel range — 15 SKUs from 1g to 500g.

OEKO-TEX Standard 100 for Packaging Accessories

OEKO-TEX Standard 100 (administered by the OEKO-TEX Association, Switzerland) tests textiles and related accessories against hundreds of potentially harmful substances — azo dyes, formaldehyde, heavy metals, pesticides, pH. The certification is split into four product classes based on skin contact level:

Class	Product type	Test stringency	Desiccant required?
Class I	Baby products for children under 3 years	Most stringent	Yes — if desiccant is packed inside the same unit as the product
Class II	Direct skin-contact items (T-shirts, underwear, towels)	Strict	Yes — if packed inside the product's PE bag
Class III	No direct skin contact (outerwear, curtains)	Moderate	Typically required — accessory inside carton
Class IV	Decorative and furnishing materials	Basic	Depends on buyer requirement

In practice, major US and EU brands (H&M, Zara, Uniqlo, etc.) require all packaging accessories — PE bags, hangers, pins, stickers, desiccants — to carry OEKO-TEX Standard 100 certification, regardless of class. Some brands request the OEKO-TEX certificate attached to the commercial invoice for each shipment.

CEMACO Sai Gon desiccant pouches use PP spunbond non-woven fabric — chemically inert, free of dyes and surface treatment chemicals. Customers requiring test reports or CoC documentation should contact us directly. Reference: OEKO-TEX Standard 100 — Global Testing and Certification System.

REACH SVHC and Annex XVII — CoCl₂ Is a NO for EU Apparel

REACH (EU Regulation 1907/2006) controls chemicals in products sold in the EU. The SVHC (Substances of Very High Concern) Candidate List currently includes over 240 substances — and Cobalt chloride (CoCl₂), a CMR Category 1B carcinogen, has been listed since 2008.

The problem for apparel exports: traditional silica gel indicators use CoCl₂ to display color (cobalt blue when dry → pink/red when saturated). When such desiccant pouches are packed inside shoe boxes, apparel cartons, or garment bags for the EU:

• If the CoCl₂ concentration in the finished product (pouch + packaging) exceeds 0.1% w/w, the company must notify SVHC presence under REACH Article 33.
• REACH Annex XVII entry 27 restricts CoCl₂ in consumer articles (including indicator silica gel sold retail) to below 0.01% w/w.
• Enforcement has intensified at EU ports since 2022, with significant fines for non-compliant CoCl₂ accessories in textile shipments.

The solution: use indicator-free silica gel (plain white, no colorant added) combined with a separate CoCl₂-free Humidity Indicator Card (HIC) — or opt for next-generation indicators based on methyl violet or bromothymol blue (no heavy metals). CEMACO Sai Gon supplies plain white silica gel, free of CoCl₂, with CoC confirmation available. Check the latest SVHC list: ECHA Candidate List of Substances of Very High Concern.

See also: CEMACO Sai Gon silica gel product range — sizes 1g to 1,000g for apparel cartons and FCL containers.

Desiccant Quantity by Apparel Product Type

The required desiccant amount depends on product weight, material, carton size, and transit duration. The table below is a reference guide for a 30-day container voyage under tropical conditions:

Apparel product	Moisture risk	Silica gel per packaging unit	Placement	Recommended SKU
Cotton T-shirts (carton of 100 pcs)	Medium	3–5g × 4 pouches per carton	4 bottom corners of carton	3g non-woven silica gel
Leather or synthetic leather shoes (single box)	High	5g per shoe box	Inside shoe box, between the two shoes	5g non-woven silica gel
Cashmere / wool (gift box)	Very high	10g per box	Under tissue paper layer, beside product	10g non-woven silica gel
Backpacks and fabric bags (carton of 24 pcs)	Medium	3g × 2 pouches inside each PE bag	Inside the individual product PE bag	3g non-woven silica gel
20ft FCL mixed apparel container	High (container rain)	50g × 16–20 pouches hung on container walls	Hung on horizontal bars, evenly distributed	50g Tyvek silica gel

Note: Values above apply to standard PE bag or MBB packaging. Double-wall corrugated cartons retain moisture better internally — you may reduce desiccant quantity by 10–15%. Free consultation: 0983 929 232.

Desiccant Placement Inside Export Apparel Cartons

Placement significantly affects desiccant efficiency. Best-practice guidelines:

1. Place at the bottom corners of cartons: humid air is denser and settles at the bottom. Bottom-corner placement absorbs moisture more effectively than center placement.
2. Do not place directly on fabric: desiccant pouches need surrounding airspace to adsorb moisture through vapor diffusion. Sandwiching them against fabric reduces contact surface area and performance.
3. Individual PE bag per product with desiccant inside: ideal for premium leather goods. Each unit maintains its own sealed microenvironment, unaffected if the outer carton is opened mid-transit at a warehouse.
4. Container wall desiccant strips (50g Tyvek with hanging loop): effective for preventing container rain damage in FCL shipments. Not suitable for use inside individual cartons.
5. Never mix used and new desiccant: partially saturated pouches from a previous production run should not be reused in the same export lot — this skews total moisture absorption capacity unpredictably.

See also: EU Regulation EC 1935/2004 on materials in contact with food — applicability to desiccant pouches.

Contact CEMACO Sai Gon for free packaging layout consultation: Moisture control solutions for the apparel export industry.

Frequently Asked Questions

Why do exported garments need desiccants in the container?

During a 15–32-day ocean voyage through tropical waters, humidity and temperature inside the container fluctuate significantly. When humid air enters through ventilation gaps or when cartons absorb moisture from the container floor, mold (Aspergillus, Penicillium) can develop on fabric, leather, and wool — causing irreversible damage. Silica gel desiccants keep the carton's RH below 60%, preventing mold growth throughout transit.

What is OEKO-TEX Standard 100 and do desiccants need this certification?

OEKO-TEX Standard 100 is a certification system by OEKO-TEX (Switzerland) verifying that textiles and related accessories contain no harmful substances. Many US and EU buyers require desiccant pouches packed with the product to carry OEKO-TEX Standard 100 certification, especially for class I (baby products) and class II (direct skin contact) items. CEMACO Sai Gon supplies PP spunbond non-woven silica gel, chemically inert; contact us for test report support.

Does REACH SVHC apply to desiccants used in apparel for EU export?

Yes. Traditional indicator silica gel uses Cobalt chloride (CoCl₂) for color display. CoCl₂ is an SVHC (CMR Category 1B carcinogen) restricted under REACH Annex XVII to below 0.01% w/w in consumer articles sold in the EU. Desiccant pouches containing CoCl₂ placed inside EU-bound apparel may be detained at customs or rejected by the importer. CEMACO Sai Gon supplies CoCl₂-free silica gel, safe for EU exports.

How many desiccant pouches are needed for a carton of 100 cotton T-shirts?

For a carton of 100 cotton T-shirts (approximately 6–8 kg, carton size 60×40×40 cm), we recommend 4 pouches of 3g–5g silica gel placed at the four bottom corners. A total of 12–20g silica gel is sufficient to keep RH below 60% for a 30-day tropical container voyage. For heavier cotton fabrics or larger cartons, increase to 5g × 4 pouches.

Where can I buy silica gel pouches for leather shoe boxes for EU/US export in Vietnam?

CEMACO Sai Gon specializes in 5g non-woven silica gel pouches — the industry standard for leather shoe boxes exported to the EU and US. Pouches are plain, CoCl₂-free, free of dyes, using soft PP spunbond fabric that does not scratch leather. Packed in boxes of 1,000–2,000 pouches. Nationwide delivery, CoC available. Contact: 0983 929 232 or request a quote online.